How do I find the correct laptop battery for my device?

Check your laptop’s owner’s manual or the label on the bottom of your device for the brand and exact model number. Then verify the part number printed on your original battery to ensure compatibility.

Where is the battery part number located?

Shut down your laptop, remove the battery, and read the label printed directly on the battery. That part number is the most reliable way to confirm compatibility.

Are different battery voltages interchangeable?

No. A battery rated 11.1V is not compatible with one rated 14.8V. Always match the voltage on your original battery. Note: 10.8V equals 11.1V, and 14.4V equals 14.8V.

What should I compare before ordering a replacement battery?

Compare the size, connector type, latch position, and orientation of your original battery with the product photos and specifications on DrBattery.com.

Can I use device model numbers instead of part numbers?

You can, but battery part numbers are more precise. A single device model can support multiple battery types, so confirming with the battery’s printed part number is best.

IBM ThinkPad T400 7417 ThinkPad R400 41U3198 42T4531 42T467742T5225 41U3197 42T5262 [10.8V / 48Wh] Laptop Battery Replacement

IBM ThinkPad T400 7417 ThinkPad R400 41U3198 42T4531 42T467742T5225 41U3197 42T5262 [10.8V / 71Wh] Laptop Battery Replacement

IBM 42T5229 41U3198 Battery for IBM ThinkPad T400 7417 Series IBM Enchanced T400 Series R400 Series 42T5265 41U3198 42T4677 42T4531 42T467742T5225 41U3197 42T5262 [10.8V] Compatible Battery

$40.95 USD

~~$63.70 USD~~ Sale $40.95 USD

Minimum Qty	Discount
Buy 5 +	Price with 10% off: $36.86
Buy 10 +	Price with 20% off: $32.76

Discount will be applied at Checkout page

Capacity 4400mAh / 48Wh

Product variants

Product Info

Type Laptop Battery
SKU LIB204-db-001
Cell Type Conventional Li-ion
Warranty 1 Year
Shipping Free Shipping

Description
Specification

COMPATIBLE LAPTOP MODELS

IBM:

Elite R400 | Elite T400 | Enchanced T400 | R400 | R61 14 in widescreen | R61 7732 | R61 7733 | R61 7734 | R61 7735 | R61 7736 | R61 7737 | R61 7738 | R61 7742 | R61 7743 | R61 7744 | R61 7751 | R61 7753 | R61 7754 | R61 7755 | R61i 14 in widescreen | R61i 7732 | R61i 7742 | T400 | T400 2764 | T400 7417 | T61 14 in widescreen | T61 1959 | T61 6377 | T61 6378 | T61 6379 | T61 6480 | T61 6481 | T61 7658 | T61 7659 | T61 7660 | T61 7661 | T61 7662 | T61 7663 | T61 7664 | T61 7665 | T61p 14 in widescreen

COMPATIBLE ORIGINAL BATTERY NUMBERS

IBM:

42T4547 | 42T4652

Lenovo:

41U3196 | 41U3197 | 41U3198 | 42T4530 | 42T4531 | 42T4532 | 42T4546 | 42T4548 | 42T4552 | 42T4677 | 42T5225 | 42T5226 | 42T5227 | 42T5228 | 42T5229 | 42T5230 | 42T5262 | 42T5263 | 42T5264 | 42T5265 | 43R2499

REMARKS
- This battery is only compatible with IBM / Lenovo ThinkPad T61, T61p, R61, R61i 14.1" Widescreen Series, R400 and T400.
- The battery will protrude out the (bottom/side) of the laptop.
- Please confirm your laptop model and battery number before placing an order
Product Type: Replacement Laptop Battery

Condition: New

Cell Type: Conventional Li-ion

Capacity: 4400mAh / 48Wh or 6000mAh / 71Wh

Device Voltage: 10.8V

Product Type:	Replacement Laptop Battery
Condition:	New
Cell Type:	Conventional Li-ion
Capacity:	4400mAh / 48Wh or 6000mAh / 71Wh
Device Voltage:	10.8V

Laptop Battery FAQs How To Find The Correct Battery?

How can I extend laptop battery life through settings?

Use Battery Saver or Power Saver mode to minimize background activity and reduce screen brightness. Choose energy-efficient power plans instead of “Balanced” or “High Performance”.

Does reducing screen brightness really help my battery last longer?

Yes. The display is one of the largest power drains. Lowering brightness can significantly conserve battery life.

Will closing unused apps and tabs improve battery life?

Yes. Idle apps and browser tabs continue consuming power. Closing them reduces background activity and extends runtime.

Is keeping my laptop cool important for battery longevity?

Absolutely. Heat accelerates battery wear. Use your laptop on hard surfaces, keep vents clean, and consider a cooling pad during heavy use.

What’s the ideal battery charge range for long-term health?

Keep the battery between 20% and 80% whenever possible. Avoid full discharges or keeping it at 100% constantly.

Are regular OS and driver updates important?

Yes. Updates often include power efficiency improvements, helping your system run more smoothly and save battery.

Should I unplug unused peripherals to save power?

Yes. Devices like external drives, USB accessories, and Bluetooth peripherals draw power even when idle. Disconnect them when not needed.

Is shutting down better than sleep for battery conservation?

Yes. Sleep still draws some power. Shutting down completely conserves the most battery during long idle periods.

Can hibernation extend battery life effectively?

Yes. Hibernation saves your session to disk and powers off completely, using no battery while preserving your work.

What quick tips help in a battery pinch?

Turn off Wi-Fi and Bluetooth when not in use, close background apps, use dark mode, and enable power-saving display settings.

Choosing the correct replacement battery or adapter is critical for safety, performance, and compatibility. DrBattery.com carries over 120,000 compatible models and part numbers for major laptop brands. Follow these steps before placing your order:

1. Check Your Device Information

Look at your device’s owner’s manual or label on the bottom of your laptop. Both should show the brand and exact model number.
If you are buying an adapter, confirm the model number, input voltage, and current listed on your device label.

2. Verify the Original Battery Part Number

Always shut down your laptop before removing the original battery. On the battery label, you will find a part number. This part number is the most reliable way to ensure compatibility.

3. Recognize Common Part Number Formats

Major manufacturers use standard codes. Here are some examples:

HP / Compaq:
123456-001

Sony:
PCGA-BP12, VGP-BP1

Dell:
312-1234, 1234P

IBM / Lenovo:
02K1234, 08K1234

Toshiba:
PA1234U-1BRS

4. Compare the Physical Details

Check the size, connector type, latch position, and orientation of your original battery. Compare these details with the product photos on our website before ordering.

5. Watch Out for Voltage Differences

Some models have two different voltage options — for example, 11.1V vs. 14.8V. They are NOT interchangeable. Always confirm the voltage printed on your original battery.

A Li-Ion battery labeled 10.8V is the same as one labeled 11.1V.
A Li-Ion battery labeled 14.4V is the same as one labeled 14.8V.

Example Battery Labels

Example laptop bottom label with model number

Featured collection

10 Pack Dr.Bulbs A19 8.5W (Replace 60W incandescent) 2700K Warm White Dimmable LED Filament Bulb

150W USB Type C Charger AC Adapter Power Cord with 4 Ports GaN Desktop Charger USB C Charging Station for MacBook Pro Air M1 M2 model Dell XPS HP Lenovo Asus Acer Steam Deck All Computer and Smart Phone

$81.90 USD

~~$128.70 USD~~ $81.90 USD

Combine Any 5+ Laptop Batteries or Adapters for 10% Off, 10+ for 20% Off!

Bulb Savings: Buy 5+ Packs (6, 8, 10, or 12) for 10% Off; 10+ Packs for 20% Off!

Stock Up And Save Big On Each Category!

IBM 42T5229 41U3198 Battery for IBM ThinkPad T400 7417 Series IBM Enchanced T400 Series R400 Series 42T5265 41U3198 42T4677 42T4531 42T467742T5225 41U3197 42T5262 [10.8V] Compatible Battery

Product Info

COMPATIBLE LAPTOP MODELS

COMPATIBLE ORIGINAL BATTERY NUMBERS