L21M4PE2 L21C4PE2 Battery Replacement for Lenovo Yoga 6-13ABR8 Yoga 6-13ALC7 Series Laptop Battery L21D4PE1 L21L4PE2 SB11F29412 5B11F29411 SB11F29410 5B11F29414 SB11F29418 5B11F29421 59Wh

Laptop model (Printed on the A side or bottom case, such as MacBook A2289, ThinkPad T14 Gen2)
Battery Part Number or Model Name (On the label when the battery is removed, such as HP MU06, Dell 0V9HXX, R73TC, XVJNP)
Battery shape + interface direction (card slot position, cable length, number of positioning posts)

Courteous and sincere recommendations
Most customers purchase the wrong batteries because some compatible laptop models and replacement batteries are complicated. Please be sure to confirm your original battery model and appearance, compared with our battery image, make sure that's what you need
If you're not sure, you can also take photos of the old battery, compare the front and back, interface, and send them to us to confirm "whether it can fit properly" to avoid the compatibility issue

Battery ModelL21C4PE2Battery TypeLi-ionBattery Voltage15.52VBattery Capacity59W / 3815mAhBattery Condition100% Brand New From ManufacturerPackaging1* L21C4PE2 Battery+1*Manual+1*Tool Kits Our batteries have undergone strict testing and perfectly match the listed models, enabling plug-and-play functionality
Laptop Battery Usage and Maintenance Guide
I. Battery Usage and Maintenance Tips

Activation Method for New Batteries: After receiving a new battery (usually with an initial charge of approximately 50%), first discharge the battery to 10% - 20%, then fully charge it. Repeat this process 3 - 5 times to maximize the initial performance of the battery
Avoid Over-discharging: Do not discharge the battery to 0%, as this may damage the battery cells and accelerate battery aging. When the battery level is extremely low, the laptop may shut down suddenly
Charge in a Timely Manner: After the battery is exhausted, charge it promptly. If the battery is not charged for a long time, it may be damaged
Storage for Long-term Inactivity: If you plan not to use the laptop for a long time, charge the battery to more than 70% before storing it, and the optimal storage period should not exceed 3 months
Use the Battery Regularly: If you often use the laptop with the charger connected, it is recommended to use the battery power (i.e., disconnect the charger) at least once a week to maintain battery activity
Choose Compliant Chargers: Use original chargers or chargers from well-known brands. Poor-quality chargers will affect the normal charging of the battery and may even damage the battery
Maintain Device Heat Dissipation: Clean the fan dust regularly to improve the device's heat dissipation effect, reduce power consumption, and effectively extend the battery life
Explanation of Battery Level Fluctuations: During the battery discharge process, the remaining power percentage and estimated usage time may fluctuate up and down due to running different software, which is a normal phenomenon. Please focus on whether the actual usage time is within the normal range

II. Causes and Solutions for Laptop Battery Not Being Recognized

Loose Battery Connection: The battery may not be recognized due to loose installation. You can remove the battery and reinstall it, ensuring that the battery connector is tightly connected to the motherboard interface (if the battery cannot be charged, you can first try reinstalling the battery)
Damaged Conductive Components: If the conductive materials at the contact points between the laptop motherboard and the positive and negative electrodes of the battery are damaged, the battery may also not be recognized. You can use an original battery for comparison and confirmation (if recognition is restored after replacing with the original battery, it is likely a problem with the conductive components of the original battery)
Abnormal Battery Driver: Check whether the battery driver is in normal working condition. If the driver is abnormal, you need to download the driver software corresponding to the model for