Genuine-spec touchpad flex cable compatible with both MacBook Air A2179 (Intel, 2020) and A2337 (M1, 2020)—restores full Force Touch functionality, haptic feedback, and precise multi-touch gesture control during trackpad repair or replacement. Compatible With: MacBook Air 13″ (2020, Intel) – Model A2179 (Model Identifier: MacBookAir9,1) MacBook Air 13″ (2020, Apple M1) – Model A2337 (Model Identifier: MacBookAir10,1) MacBook Air 13″ (2020, Intel) – Model A2179 (Model Identifier: MacBookAir9,1) MacBook Air 13″ (2020, Apple M1) – Model A2337 (Model Identifier: MacBookAir10,1) ✅ Important Note: Despite different processors (Intel vs. M1), Apple used the same trackpad assembly and flex cable in both A2179 and A2337. This makes the flex cable fully interchangeable between the two models. Part Type: Touchpad flex cable only — does not include the trackpad housing, Taptic Engine, or mounting hardware. This is the OEM-style ribbon cable that connects the trackpad to the logic board. Function: Transmits: Touch input coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support: Force Click, three-finger lookup, swipe navigation, pinch-to-zoom, and smooth cursor tracking. Touch input coordinates Force Touch pressure data Haptic feedback signals to the Taptic Engine Enables full macOS gesture support: Force Click, three-finger lookup, swipe navigation, pinch-to-zoom, and smooth cursor tracking. OEM-Quality Build: Matches Apple’s original specifications in: Cable length and routing path Connector pitch and ZIF latch design EMI shielding and flex durability Cable length and routing path Connector pitch and ZIF latch design EMI shielding and flex durability Common Use Cases: Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Replacing a torn, creased, or liquid-damaged original flex cable Completing a trackpad replacement when the original cable is compromised Fixing intermittent trackpad behavior, loss of Force Touch, or complete unresponsiveness Installation Note: Requires full bottom case removal and battery disconnection. Cable routes under the right side of the battery and logic board. Connects via a ZIF (Zero Insertion Force) socket—align carefully and latch gently. Recommended for experienced or certified technicians only. Requires full bottom case removal and battery disconnection. Cable routes under the right side of the battery and logic board. Connects via a ZIF (Zero Insertion Force) socket—align carefully and latch gently. Recommended for experienced or certified technicians only.
Used, original 35 W USB-C charger for Mac — reliable Apple power adapter (dual USB-C) for charging your Mac and other devices. This is an authentic Apple 35 W USB-C power adapter (dual-port) — used but tested. It’s built to charge MacBooks, iPhones, iPads, and other USB-C devices. Though lower wattage than larger Mac adapters, it works well for light use or supplemental charging. Features & Behavior Dual USB-C ports: can charge two devices simultaneously Intelligent power distribution: if both ports are used, the output splits evenly (~17.5 W each) USB Power Delivery support across standard profiles (5V, 9V, 15V, 20V) Accepts input 100-240V AC, so usable worldwide (with correct plug) Compact form factor in one variant, or standard “duckhead” plug style in another Specifications Strengths & Limitations Pros Authentic Apple unit — safer and more reliable than generic chargers Dual ports give flexibility — charge phone + Mac concurrently Portable and suitable for travel (universal voltage) Cons 35 W is low for MacBook Pro under load — might not maintain charging during heavy use When both ports used, power is halved (~17.5 W each) Used condition may include wear, scuffs, or reduced efficiency
WiWU Hali Vertical Layer Bag — stylish and protective carrying case for laptops and tablets.• Available in 11” & 14” sizes • Water-resistant fabric • Shockproof designMultiple Compartments | Sleek & Lightweight The WiWU Hali Vertical Layer Bag combines modern design with excellent protection for your laptop or tablet. Built from durable, water-resistant materials, it features multiple compartments for organized storage and a slim profile for easy portability. Key Features Available Sizes: 11-inch and 14-inch models High-quality water-resistant fabric for reliable protection Shock-absorbing padding to keep devices safe from bumps and drops Multiple storage layers for accessories such as chargers, cables, and notebooks Soft interior lining to prevent scratches on your device Durable zippers and reinforced stitching for long-lasting use Comfortable top handle and slim vertical design for easy carrying Perfect for travel, school, or office use Specifications Feature Detail Brand WiWU Model Hali Vertical Layer Bag Sizes 11” / 14” Material Water-resistant Oxford fabric Color Options Grey / Black (varies by stock) Design Vertical multi-layer with zip closure Compatibility Fits laptops or tablets up to respective size The WiWU Hali Vertical Layer Bag combines modern design with excellent protection for your laptop or tablet. Built from durable, water-resistant materials, it features multiple compartments for organized storage and a slim profile for easy portability. Available Sizes: 11-inch and 14-inch models High-quality water-resistant fabric for reliable protection Shock-absorbing padding to keep devices safe from bumps and drops Multiple storage layers for accessories such as chargers, cables, and notebooks Soft interior lining to prevent scratches on your device Durable zippers and reinforced stitching for long-lasting use Comfortable top handle and slim vertical design for easy carrying Perfect for travel, school, or office use
Apple 60W MagSafe Power Adapter (for MacBook and 13-inch MacBook Pro) The 60 Watt MagSafe Power Adapter features a magnetic DC connector that ensures your power cable will disconnect if it experiences undue strain and helps prevent fraying or weakening of the cables over time. In addition, the magnetic DC helps guide the plug into the system for a quick and secure connection. When the connection is secure, an LED located at the head of the DC connector will light up; an amber light lets you know that your portable is charging, while a green light tells you that you have a full charge. An AC lead is provided with the adapter for maximum lead length, while the AC wall adapter (also provided) gives users an even easier and more compact way to travel. Designed to be the perfect travelling companion, the adapter has a clever design that allows the DC cable to be wound neatly around itself for easy cable storage. This power adapter recharges the lithium polymer battery while the system is off, on, or in sleep mode. It also powers the system if you choose to operate without a battery. Compatible with MacBook and 13-inch MacBook Pro. See this article for more details about choosing the right one. Knowing which specific Mac model you have is important. If you are running OS X Lion (10.7) or later, go to the “” menu at the top left of your screen, choose “About this Mac” then click the “More Info…” button. Your Mac model and generation will be displayed. If you are running an earlier version of OS X, you can enter your serial number here to find out which model you have.
Used OEM Original Apple Logic Board Working, 2019 Model 2.7Ghz I7 251gb 16gb (A1989) + Original Touch ID, Tested using latest industry hardware diagnostic software, Fresh pull from fully Working nearly new unit. SPECIFICATION:
A robust Beurotika cash drawer featuring a 450mm metal body, secure 3-position lock, and compatibility with most POS systems—ideal for retail, restaurants, and small businesses. Secure 3-position key lock: Open, locked, and release-to-print modes for controlled access 6 coin slots + 4 bill compartments: Organized layout for efficient cash handling Heavy-duty steel construction: Reinforced frame and smooth slide rails for daily reliability Standard RJ12 interface: Compatible with most POS systems (e.g., Epson, HP, Bixolon, and Beurotika receipt printers) Auto-open trigger: Automatically opens when connected to a compatible receipt printer during transactions Bottom cable entry: Keeps wiring neat and protected
A high-performance pre-owned MacBook Pro 15" (2015) with a stunning Retina display, upgraded 16GB RAM, 128GB SSD, and powerful 2GB dedicated graphics—ideal for developers, creatives, and power users seeking reliable Apple performance.
A premium pre-owned HP EliteOne 800 G2 all-in-one desktop with 23.8-inch display, 6th Gen Core i7, RAM upgrade options, and SSD storage options. Designed for business professionals who need performance, security, and a clean space-saving workstation.
lenovo battery L16L2PB2 L16M2PB1 L16S2PB2 L16C2PB2 Laptop Notebook Battery for Lenovo 5000-15 2ICP6/55/90 Series 7.4V 30Wh 4050mAh About this item Condition: New Voltage: 7.4V Capacity: 30Wh/4050mAh Replace Part Number: L16M2PB1 L16L2PB2 L16M2PB2 L16S2PB1 L16L2PB3 L16C2PB1 L17L2PF1 L17M2PB7 L16C2PB2 L16L2PB1 L16M2PB3 2ICP6/55/90 Fit For: Lenovo 5000-15 Series Raise the battery life: 1: After receiving the battery, Please charge it fully, discharge it to around 10, and do it three times. 2: If you don’t use the battery for a long time, please charge and discharge it once a month
MULTI-FUNCTIONAL: Portable retro speaker, support Bluetooth, U disk, Memory Card, AUX (connect to MP3, MP4 player, smartphone, PC) to play music. It is easy to enjoy stereo sound for music lovers. LONG BATTERY LIFE: Bluetooth speaker has a built-in 1800mAh battery, rechargeable and environmentally friendly, providing 8 hours of battery life, ensuring you can enjoy your favorite music and radio stations for a long time. CLEAR SOUND: The radio speaker’s built-in powerful DSP chip and antenna provide excellent reception, allowing you to experience clear sound. Stations can be easily selected, making it convenient to find your favorite FM channels. POWERFUL: This speaker is compact but with high power, the 5W speaker delivers powerful sound quality. Allows you to enjoy rich and immersive sound, transforming your room into a charming listening environment. RETRO DESIGN: The small FM radio speaker with charming and versatile design incorporates classic aesthetics, making it a delightful addition to your sound collection. For living rooms, bedrooms, parties, etc.
The Transcend TS8XDVDS-K is an ultra-slim, lightweight external portable DVD writer designed for laptops, ultrabooks, and thin desktop computers lacking internal optical drives. Offering fast 8X DVD and 24X CD read/write speeds, it provides a seamless plug-and-play solution for burning media, backing up critical data, and playing movies on the go without requiring an external power adapter. ✅ Full Specifications: Model: Transcend Extra Slim Portable DVD Drive (TS8XDVDS-K) – Black Edition Interface / Connection: Mini-USB to USB Type-A interface (Includes a specialized USB double-headed power/data cable) Performance / Speed: * DVD±R Read/Write: Up to 8X DVD±R DL (Double Layer) Read/Write: Up to 6X DVD-RAM Read/Write: Up to 5X CD-R/RW Read/Write: Up to 24X Performance / Speed: * DVD±R Read/Write: Up to 8X DVD±R DL (Double Layer) Read/Write: Up to 6X DVD-RAM Read/Write: Up to 5X CD-R/RW Read/Write: Up to 24X Capacity / Media Compatibility: Supports standard CD-R/RW, DVD±R, DVD±RW, DVD±R DL, and M-DISC long-term archival media formats. Material & Build: Durable, premium hard plastic housing with a sleek, rounded-edge aesthetic. Design & Form Factor: Extra-slim layout measuring just 13.9mm in thickness. Top-loading tray mechanism with an emergency manual eject hole. Power Setup: Fully USB bus-powered (No external power wall adapter required; draws power directly from host computer USB ports). Security & Software: Includes a free download of CyberLink Media Suite 10 (Media Writer) data burning software via registration. Supports TV Connectivity (allows plugging into supported smart TVs to play media files directly). Compatibility: Windows 11 / 10 / 8 / 7, macOS (10.7 and above), and Linux Dimensions: Approx. 142.8 x 148.0 x 13.9 mm (5.62″ x 5.83″ x 0.55″) Weight: Approx. 264 grams (0.58 lbs)
Keyboard for Macbook Pro A1502 ,A1582,A1493 13" Inch Retina Year 2013,2014,2015 Part no ME864 ME864LL/A ME866LL/A APN: 661-8154, 661-02361, 818-4278 Black US Layout Keyboard for Macbook Pro A1502 ,A1582,A1493 13″ Inch Retina Year 2013,2014,2015 Part no ME864 ME864LL/A ME866LL/A APN: 661-8154, 661-02361, 818-4278 Black US Layout Compatibility: FOR MB Pro Retina 13″ A1502 Late 2013: ME864LL/A (2.4 Core i5) Late 2013: ME866LL/A (2.6 Core i5) Late 2013: ME866LL/A (2.8 Core i7) Mid 2014: MGX72LL/A (2.6 Core i5) Mid 2014: MGX92LL/A (2.8 Core i5) Mid 2014: MGX92LL/A (3.0 Core i7) Early 2015: MF839LL/A (2.7 GHz Core i5) Early 2015: MF841LL/A (2.9 GHz Core i5) Early 2015: MF843LL/A (3.1 GHz Core i7) Identifying Numbers APN: 661-8154, 661-02361, 818-4278 Compatible part numbers: ME864 ME865 ME866 MF839 MF841 MF843 MGX72 MGX92 (Layout US) Related Part #: 661-8154, 661-02361, 818-4278 High Quality Laptop Keyboard. 100% Compatible with your brand.
A compact and powerful pre-owned HP ProBook x360 435 G8 with 13.3" non-touch display, AMD Ryzen 7 5800U, 16GB RAM, and 512GB SSD—offering strong performance and 360° versatility without touch, ideal for professionals and students on the go.
HT03XL L11119-855 Laptop Battery for HP Pavilion 14-CE 14-CF 14-DF 15-CS 15-DA 15-DB 15-DW 17-by 17-CA Series 15-CS0053CL 15-DW0033NR 15-DA0014DX L11421-542 L11421-2C2 HSTNN-UB7J HSTNN-DB8R HT03041XL About this item Compatible with: HP HT03XL Battery, for HP Pavilion 14-CE 14-CF 14-CK 14-cm 14-DF 14-MA 14Q-CS 14Q-CY 14S-CF 14S-CR 15-CS 15-CW 15-DA 15-DB 15G-DR 15T-DA 15T-DB 17-by 17-CA Series 14-CE0000 14-CE0020TX 14-CE0025TX 14-CE0027TU 14-CE0028TX 14-CE0029TX 14-CE0030TX 14-CE0034TX 14-CE1058WM 14-CE0068ST 14-CE1056WM 14-CE0064ST 14-CE0006DX 14-CF0000 14-CF0014DX 14-CF1015CL 14-CM0000 14-CM0020NR 14-CM0012NR 14Q-CS0000 14Q-CS0006TU 15-CR0000 15-CR0087CL 15-CR0052OD 15-CR0055OD 15-CR0037WM 15-CR0051CL 15-CR0091MS 15-CR0010NR Replacement Battery for HP Pavilion 15-CS0000 15-CS2010NR 15-CS025CL 15-CS2073CL 15-CS2079NR 15-CS1063CL 15-CS0072WM 15-CS0051WM 15-CS1065CL 15-CW0000 15-CW1063WM 15-DA0000 15-DA0066CL 15-DA0002DX 15-DA0079NR 15-DA1005DX 15-DA0032WM 15-DA0033WM 15-DA0073MS 15-DA0012DX 15-DA0071MS 15-DA0086OD 15-DB0000 15-DB0015DX 15-DB0031NR 15-DB0011DX 15-DB0066WM 15-DB0005DX 15-DB0048NR 15-DB0051OD 15-DB0048CA 17-BY0000 17-BY1053DX 17-BY1033DX 17-BY0060NR 17-BY0021DX 17-BY0053CL 17-BY0021CY 17-BY1055CL Laptop Compatible for HP Pavilion 240 G7, 245 G7, 250 G7, 255 G7, 340 G5, 348 G5 Series;P/N: HSTNN-DB8R HSTNN-DB8S HSTNN-IB80 HSTNN-IB8O HSTNN-LB8L HSTNN-LB8M HSTNN-UB7J HT03041XL HTO3XL HT03XL L11119-855 L11421-1C1 L11421-1C2 L11421-2C1 L11421-2C2 L11421 -2C3 L11421-2D1 L11421-2D2 L11421-421 L11421-422 L11421-423 L11421-542 L11421-544 L11421-545 TPN-C136 TPN-I130 TPN-I131 TPN-I132 TPN-I133 TPN-I134 TPN-Q207 TPN-Q208 TPN-Q209 TPN-Q210 Specifications: ht03xl battery for hp, Battery Type: Li-ion Voltage: 11.55V Capacity: 41.7WH 3470mAh;Cells: 3-cell; Color: Black Packages includes: l11119-855 hp battery, with Two Free Screwdrivers; HTO3XL Battery for hp model 15-cs0085cl 15-cs0073cl 15-cs3075cl 15-cs3073c 15t-cs300 15t-cs200 15-da0021cy 15-da0011la 15t-db000 14-cf0013dx 14-cf0051od 15-ef0023dx Compatible devices: HP HT03XL Rechargeable li-ion Battery, for HP Pavilion 14-CE 14-CF 14-CK 14-cm 14-DF 14-DH 14-MA 14Q-CS 14Q-CY 14S-CF 14S-CR 15-CS 15-CW 15-DA 15-DB 15G-DR 15T-DA 15T-DB 17-by 17-CA Series 15-cs0053cl 15-cs1063cl 15-cs2064st 15-cs3063cl 15-cs3075cl 15t-cs200 15-da0032wm 15-da0014dx 17-by0063cl 17-by2075cl 17-by0071cl 17-by1022cl 17-by0088cl 17-by0062st 17-by0020cy 17-by0017cy 17-by1003cy 17-ca1010ds 17-by0019ds 17-by2003ca 17-by3613dx 17-by1972cl 17-ca1031dx 17-ca1061nr 17-ca0054cl
Original 13.3-inch Retina LCD display (Space Gray) for MacBook Air A2337 (2020), pulled from a working unit. OEM part, ready to replace cracked or faulty screens with perfect fit and optics. This is a genuine Apple Retina display assembly removed from a working MacBook Air (model A2337, 2020). It’s ideal for repairing a damaged or nonfunctional screen on a matching model, delivering original visuals without resorting to aftermarket knockoffs. Key Features & Functionality True OEM Retina panel with factory calibration Integrated display glass, backlight, and flex cable Designed for model A2337 (Late 2020, M1) iFixit+1 Space Gray finish to match original chassis Tested: Display, backlight, no dead pixels (unless noted) Drop-in replacement requiring alignment and cable reconnection Specifications Important Notes & Considerations Must use exact model A2337 — other models are incompatible Slight blemishes or dust might exist due to being a used part Handle with care: screen glass is fragile Professional installation recommended if you’re not experienced
Genuine Apple MagSafe 3 charging cable (2-meter length), originally shipped with MacBook Pro 14"/16" (2021, M1 Pro/Max) and MacBook Pro 16" (2023, M2/M3 Max). Used but fully functional, tested for safe power delivery and data handshake with Apple laptops. Compatibility: MacBook Pro 14″ (2021–2023, M1 Pro/Max, M2 Pro/Max, M3 Pro/Max) MacBook Pro 16″ (2021–2023, M1 Max, M2 Max, M3 Max) Works with Apple 67W, 96W, and 140W USB-C Power Adapters (sold separately) MacBook Pro 14″ (2021–2023, M1 Pro/Max, M2 Pro/Max, M3 Pro/Max) MacBook Pro 16″ (2021–2023, M1 Max, M2 Max, M3 Max) Works with Apple 67W, 96W, and 140W USB-C Power Adapters (sold separately) Connector Type: MagSafe 3 (magnetic, tri-oval tip) on laptop end USB-C on power adapter end MagSafe 3 (magnetic, tri-oval tip) on laptop end USB-C on power adapter end Cable Length: 2 meters (≈6.6 feet) – longer than the standard 1.8m cable, ideal for flexible desk or bedside setups. Condition: Original Apple cable, previously used but fully tested: No fraying, kinks, or exposed wires MagSafe 3 connector intact with strong magnetic hold Charges MacBook at full rated speed (supports up to 140W with compatible adapter) Passes Apple’s authentication handshake (no “Not Supported” warnings) No fraying, kinks, or exposed wires MagSafe 3 connector intact with strong magnetic hold Charges MacBook at full rated speed (supports up to 140W with compatible adapter) Passes Apple’s authentication handshake (no “Not Supported” warnings) What’s Included: MagSafe 3 to USB-C cable only Power adapter NOT included MagSafe 3 to USB-C cable only Power adapter NOT included Why Choose This: Cost-effective alternative to buying new 100% genuine Apple—no third-party risks (overheating, slow charging, compatibility errors) Ideal for backup, travel, or replacing a damaged original cable Cost-effective alternative to buying new 100% genuine Apple—no third-party risks (overheating, slow charging, compatibility errors) Ideal for backup, travel, or replacing a damaged original cable
Battery Model: A1493 A1502 Replacement Laptop Battery for MacBook Pro Retina 13 Inch Late 2013 Mid 2014 ; MacBook Pro A1493 A1582 Battery EMC 2678 2875 2835 ME864 ME865 100% Brand New, Battery Type: Li-Polymer; Capacity: 71.8Wh; Voltage:11.34V; Package include two free screwdriver Compatible:A1502 A1493 (Only for Late 2013, Mid 2014 Version) Apple MacBook Pro 13″ Retina ME864LL/A ME866LL/A ,MacBook Pro “Core i5″ 2.4/2.5 13” Late 2013 Retina Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety.
BATTERY DELL M5Y1K Laptop Battery for Dell Inspiron 15 5000 5555 5558 5559 3552 3558 3567 14 3451 3452 3458 5458 17 5755 5758 Series Rechargeable 40WH li-ion Battery Replacement Fit GXVJ3 VN3N0 YU12005-13001D About this item 【Specification】Dell laptop Replacement Battery Type: Li-ion; Voltage: 14.8 V; Capacity 2600MAH/40WH; Cells:4-Cell 【Stability】M5Y1K Laptop Battery Replacement battery for Dell offers 500+ recharge cycles over life of battery 【COMPATIBLE MODEL】(Check description below for more models) Dell 40WH Standard Rechargeable Li-ion Battery Type M5Y1K 14.8V YU12005-13001D 453-BR GXVJ3 HD4J0 M5YIK MSY1K Dell Inspiron 14 15 3000 Laptop Replacement Battery 3558 3458 3567 3452 3565 3459 P60G Dell Inspiron 14 15 17 5000 Laptop Battery 5555 5558 5559 5755 5758 5458 Dell Vostro Laptop Battery 3558 3458 Dell Latitude Laptop Battery 3460 3560 【GUARANTEE】Our Dell M5Y1K replacement laptop battery is 100% Compatible with the originals. Complying with the CE/FCC/ROHS/UL Certified Standard
Genuine-spec US layout (QWERTY) black keyboard replacement for MacBook Air 13.6″ and 15″ models (2023–2025, M2/M3/M4 chips)—featuring Apple’s Magic Keyboard with scissor-switch mechanism, backlighting, and precise OEM fit. Compatible With: 13.6″ MacBook Air: A2681 (M2, 2022–2023), A3113 (M3, 2023–2024), A3240 (M4, 2024–2025) 15″ MacBook Air: A2941 (M2, 2023), A3114 (M3, 2023–2024), A3241 (M4, 2024–2025) 13.6″ MacBook Air: A2681 (M2, 2022–2023), A3113 (M3, 2023–2024), A3240 (M4, 2024–2025) 15″ MacBook Air: A2941 (M2, 2023), A3114 (M3, 2023–2024), A3241 (M4, 2024–2025) Keyboard Layout: Standard US English (QWERTY) with wide Enter key, dedicated left/right arrow keys in inverted-T layout, and full function row—matches Apple’s original US configuration. Design: Apple’s Magic Keyboard with scissor-switch mechanism—providing quiet, stable, and responsive typing with 1mm key travel and enhanced durability. Features: Integrated backlighting for low-light use, ambient light sensor compatibility, and OEM-style flex cable for direct logic board connection. Color: Sleek black keycaps—ideal for Space Gray and Midnight finishes, and visually consistent across all color variants. Precision Fit: Engineered to exact Apple specifications for alignment, key spacing, and mounting—ensures seamless integration into the original top case. Installation Note: The keyboard is factory-glued into the top case. Replacement requires full disassembly, careful removal, and professional-grade re-adhesion. Recommended for experienced technicians only.
lenovo battery L14M3P24 11.1V 45Wh 4050mAh L14M3P24 Battery COMPATIBLE L14S3P24 L14M3P24 L16M3P24 LAPTOP BATTERY FOR LENOVO IDEAPAD XIAOXIN 700 R720 Y700-14ISK Y520-15IKB Y720-14ISK SERIES 4 Cell Laptop Battery About this item Condition: New Voltage: 11.1V Capacity: 45Wh/4050mAh Replace Part Number: L14M3P24 L14S3P24 Fit For: Lenovo Ideapad 700 Ideapad 700 Series The Package Includes 1X L14M3P24 battery. Before purchasing, please open the laptop’s back cover to confirm the battery model and capacity. Raise the battery life: 1:After receiving the battery, Please charge it fully, then discharge it to around 10%, and do it three times. 2:If you don’t use the battery for a long time, please charge and discharge it once a month
