MULS L21M4P74 L21C4P72 Laptop Battery Replacement for Lenovo ThinkPad T16 Gen 1, T16 Gen 2, P16S Gen 1, P16S Gen 2 Series L21D4P73 L21M4P73 L21D4P72 L21L4P72 SB10W51972 5B10W51871 5570mAh 15.44V 86Wh

About MULS
1. We have professional battery and adapter experience!
Strictly test before shipment to ensure full capacity and safety without harming the computer!
2. We recommend that the first charge is not less than 5 hours.
3. The new battery cannot be charged, is there a problem with the battery?
Usually not. The computer charges the battery for the first time. Due to the instability of voltage and current, the computer may stop charging the battery when the battery is half charged (sometimes more, sometimes less). If this happens, Don't worry, just take the battery out of the computer and recharge it again. The new battery charged for the first time may require several iterations. Don't worry, this is normal.
4. When the battery is in normal operation, if the battery is discharged to 3%, it must be shut down or recharged. If the battery is discharged to 0%, the battery will be damaged and its life will be attenuated.
5. Avoid falling, heating, and short-circuit, avoid using the battery in an environment where the temperature is too high or too low.
Specification: Voltage: 15.44V Capatity: 86Wh 5570mAh 4-cell Condition: 100% brand new from manufacture, Grade A cell
Replacement for Part Number

L21M4P74 SB10W51972 5B10W51871 5B11M90037
L21C4P72 SB10W51973 5B10W51872 5B11M90038
L21D4P73 SB10W51974 5B10W51873 5B11M90039
L21M4P73 SB10W51970 5B10W51869 5B11M90035
L21L4P72 SB10W51969 5B10W51868 5B11M90034
L21D4P72 SB10W51971 5B10W51870 5B11M90036
Compatible Laptop Models:

Lenovo ThinkPad P16s Gen 1 (Type 21BT, 21BU) Series
Lenovo ThinkPad P16s Gen 1 (Type 21CK, 21CL) Series
Lenovo ThinkPad P16s Gen 2 (Type 21HK, 21HL) Series
Lenovo ThinkPad P16s Gen 2 (Type 21K9, 21KA) Series
Lenovo ThinkPad T16 Gen 1 (Type 21BV, 21BW) Series
Lenovo ThinkPad T16 Gen 1 (Type 21CH, 21CJ) Series
Lenovo ThinkPad T16 Gen 2 (Type 21HH, 21HJ) Series
Lenovo ThinkPad T16 Gen 2 (Type 21K7, 21K8) Series
Please open the back cover of your laptop to check the original battery size and capacity before placing an order. Please scroll down to the list to purchase.
1. Turn off your laptop and disconnect the power.
2. Disconnect the connection between the old battery and the motherboard to avoid unnecessary damage caused by disassembling the battery. Then unscrew the old battery screws one by one and carefully save each screw.
3. Remove the old battery, carefully connect the new battery to the mainboard, reinstall all the parts that have been removed earlier, and connect the wiring of the new battery.
4. If you don't understand the above steps, you can search the relevant installation tutorial video on YouTube for help.
1. New battery: Discharge the new battery to 10% (not 0%), then charging up to 95% and repeat 3-4 times to activate the maximum capacity.
2. Overuse: Do not always run out of a battery to 0%, that would damage the battery or shorten the usage life.
3. Charging sequence: when charging, first install the battery, then turn on the power, when fully charged, first cut off the power, then pull the power plug.
4. Fully charge the battery before long-term storage, and keep charging once a month.
Do not store the battery at low power circumstances.
Could be caused by battery loss. Please re-install the battery and make sure that the battery cable and the motherboard interface are tightly inserted.
Maybe due to conductive material damage which the laptop motherboard and battery anode and cathode contact position, you can try to confirm it with your original battery.
Check whether the battery drive is in normal condition, if not, download the corresponding driver software to update.
MULS L21M4P74 Replacement Battery How to Install A New Battery: Tips for Battery Maintenance: Why the laptop does not recognize the battery