Overview: L21L4P72 Replacement Battery for Lenovo ThinkPad P16s Gen 1 (Type 21BT, 21BU) Series
This Lenovo replacement laptop battery is identified as L21L4P72 for the listed Lenovo computer families. It provides 15.44V output and 52.5Wh/3400mAh energy capacity in a black Li-polymer pack. Compare the part references and machine types below with the installed battery before ordering. The sections organize electrical details, cross-reference numbers, fitment information, and selection guidance for service work.
Specs
| Specification | Value |
|---|---|
| Standard Model | L21L4P72 |
| Voltage | 15.44V |
| Capacity | 52.5Wh/3400mAh |
| Battery Type | Li-polymer |
| Cell Origin | Made in China |
| Color | Black |
Parts
Part numbers: SB10W51969, SB10W51973, SB10W51974, SB10W51972, SB10W51971, SB10W51970
Models
- Lenovo ThinkPad P16s Gen 1 (Type 21BT, 21BU) Series For Lenovo ThinkPad P16s Gen 1 (Type 21CK, 21CL) Series For Lenovo ThinkPad P16s Gen 2 (Type 21HK, 21HL) Series For Lenovo ThinkPad P16s Gen 2 (Type 21K9, 21KA) Series For Lenovo ThinkPad T16 Gen 1 (Type 21BV, 21BW) Series For Lenovo ThinkPad T16 Gen 1 (Type 21CH, 21CJ) Series For Lenovo ThinkPad T16 Gen 2 (Type 21HH, 21HJ) Series For Lenovo ThinkPad T16 Gen 2 (Type 21K7, 21K8) Series
FAQ
What product model is listed?
L21L4P72 is the standard reference for this replacement battery.
Which devices are compatible?
The source lists Lenovo ThinkPad P16s Gen 1 (Type 21BT, 21BU) Series For Lenovo ThinkPad P16s Gen 1 (Type 21CK, 21CL) Series For Lenovo ThinkPad P16s Gen 2 (Type 21HK, 21HL) Series For Lenovo ThinkPad P16s Gen 2 (Type 21K9, 21KA) Series For Lenovo ThinkPad T16 Gen 1 (Type 21BV, 21BW) Series For Lenovo ThinkPad.
Which specifications and part numbers should be matched?
Compare Voltage: 15.44V; Capacity: 52.5Wh/3400mAh; Battery Type: Li-polymer and the listed references SB10W51969, SB10W51973, SB10W51974, SB10W51972, SB10W51971, SB10W51970 with the original unit or label.
What should be checked before installation or use?
Check the connector, physical fit, device model and source-listed specifications.
Note:
This is not a complete list or inclusion of all compatible laptop models. You can open the back of your laptop to check the original battery model. If you have any compatibility questions, please contact us online.High Quality Garanteed
Our battery products are manufactured using high-quality materials and advanced technology to ensure stability and reliability.
The casing is made of durable materials, the mainboard adopts advanced technology, and the battery core is produced with high-quality raw materials to ensure that it will not be damaged after long-term use.
Our products are equipped with multiple protection technologies such as overvoltage, overcurrent, and overcharge to effectively protect the safety of batteries and equipment.
The casing is made of durable materials, the mainboard adopts advanced technology, and the battery core is produced with high-quality raw materials to ensure that it will not be damaged after long-term use.
Our products are equipped with multiple protection technologies such as overvoltage, overcurrent, and overcharge to effectively protect the safety of batteries and equipment.
China warehouse delivery method
Shipping Methods
Ship To
Est. Delivery Time
Shipping Cost
Taxes & Fees
USPS
United States(No AK/HI, PR/GU, PO Boxes, or APO/FPO)
10-15 business days
Free
Free
Canada Post
Canada
10-15 business days
Free
Free
Royal Mail / Yodel
United Kingdom
15-20 business days
Free
Free
Local Carriers
Germany/Netherlands/Norway
15-20 business days
Free
Free
La Poste
France
15-20 business days
Free
Free
Local Carriers
Australia/New Zealand
15-20 business days
Free
Free
Correios
Mexico/Spain/IT
15-25 business days
Free
Free
Local Carriers
SE Asia / East Asia
5-10 business days
Free
Free
Local Carriers
Rest of Europe
20-25 business days
From $5.99
Free
Local Carriers
UAE / Saudi Arabia / Israel
16-20 business days
From $7.99
Free
Overseas Warehouse Shipping Times & Costs
Shipping Methods
Ship To
Est. Delivery
Shipping Cost
Taxes & Fees
US Warehouse
United States
3-7 business days
Free
Free
European Warehouse
EU countries
5-7 business days
€0 – €5.99
pricing varies by country
Free
UK Warehouse
United Kingdom
3-7 business days
Free
Free
Canada Warehouse
Canada
5-7 business days
Free
Free
Payment Methods
Paypal
Payments by PayPal, no PayPal account required. Paypal is safe and free for buyers.
PayPal account: Payment@batterymall.com
Account Name: ShenZhen KingSener Science and Technology Co., Ltd
Credit or debit card
VISA, MasterCard, the United States n Express,Maestro & Laser Card, APPLE Pay,etc.
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WeChat Pay
Currently only supports QR code payment. Please contact WeChat customer service and go to WeChat App to scan the QR code to complete the payment.
Google Pay
Pay with Google Pay, which is more convenient and faster.
Apple Pay
If you use an Apple device, you can use Apple Pay to pay, which is more convenient and faster.
Bank Transfer
If you cannot use the above payment methods and the order amount exceeds HK$2000, please contact our customer service to obtain your bank account and pay via bank transfer.
Q&A
Quick FAQ:Laptop Battery Care & Troubleshooting
- What Should I Know Before Buying a Laptop Battery Replacement?A: Before buying a laptop battery replacement, confirm your laptop’s exact model number and the part number printed on the original battery. Check the battery voltage, connector, physical dimensions, and compatibility list. Do not choose a battery based on appearance alone, because similar laptop models may use different batteries. Review the seller’s warranty, return policy, and product specifications before ordering.
- How Do I Find a Compatible Laptop Battery for My Device?A: To find a compatible laptop battery, identify your laptop’s full model number and the part number on the original battery. Compare these details with the replacement battery’s compatibility list and specifications, including voltage, connector type, and dimensions. If you are unsure, contact customer support with your laptop model and original battery part number before placing an order.
- Can I leave my laptop plugged in 24/7?Yes, the built-in TI chip prevents overcharging. Tip: To prevent long-term cell swelling, unplug and drain the battery to 40% twice a month.
- Why Is My Laptop Battery Not Charging?A: A laptop battery may not charge because of a faulty AC adapter, damaged charging port, loose connection, temperature protection, battery-health settings, or a worn-out battery. Confirm that you are using a compatible charger and inspect the cable and port for visible damage. Restart the laptop and review the manufacturer’s battery or charging settings. If the battery becomes unusually hot, swollen, or damaged, stop using it and seek professional assistance.
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Are BatteryMall Laptop Batteries Reliable?BatteryMall laptop batteries are designed with safety and reliability in mind. All batteries feature built-in IC protection against short-circuits, over-voltage, and overheating, helping protect the battery during normal use. They are also CE, FCC, and RoHS certified. For the best experience, choose a compatible laptop battery that matches your exact laptop model and original battery part number, and follow the installation and care instructions. BatteryMall also provides a 1-year warranty on KingSener batteries purchased from BatteryMall; see the Product Warranty page for details.