High Quality 10.8V/6cells 6700mAh/72WH LENOVO 42T4731 Battery For Lenovo E40 E420 SL410K T410i T420 E520 W520

Do you want to buy a cheap LENOVO 42T4731 Compatible battery? We offer you a cheap LENOVO 42T4731 Compatible battery - an incredibly high quality Compatible battery! All LENOVO 42T4731 are brand new,1 year Warranty, 100% Guarantee Quality and Fully Test!

✔ Battery for 42T4731 Ships to Singapore

Product Overview

This battery is suitable as a replacement battery for Lenovo E40 E420 SL410K T410i T420 E520 W520 battery and LENOVO 42T4731 model.

High capacity LENOVO 42T4731 battery for longer standby time.

The battery is professionally tested to ensure the best lifespan.

1 year warranty, 30 days money back, 100% brand new!

Battery capacity (mAh/A/W) may be different; the more mAh/A/W it displays, the higher its autonomy.

Safety certified CE / FCC / RoHS.

Key Features

• High‑capacity design with 6700mAh/72WH for extended device runtime.
• Stable 10.8V/6cells output ensures consistent performance during daily use.
• Built with high‑quality lithium‑ion cells for improved durability and long cycle life.
• Advanced protection system including overcharge, over‑discharge, overheat, and short‑circuit safeguards.
• Optimized for reliable performance in warm and humid environments.
• Lightweight and compact design for easy installation and device compatibility.

Technical Specifications

Model	42T4731
Battery Condition	Brand New Replacement Battery
Item Code	LEN19I805_1
Category	Laptop Batteries
Brand	LENOVO
Capacity	6700mAh/72WH
Voltage	10.8V/6cells
Type	Li-ion
Color	Black
Applies to	Lenovo E40 E420 SL410K T410i T420 E520 W520
Certification	Passed CE, UL, ROHS, ISO 9001/9002 and GS certification
Service	Buy now, we promise a one-year warranty and 30-day returns

Compatible Models

Replacement Part Numbers:

• 42T4235
• 42T4731
• 42T4733
• 42T4737
• 42T4753
• 42T4757
• 51J0499
• 57Y4185
• ASM_42T4703
• ASM_42T4752
• ASM_42T4756
• ASM_42T4794
• ASM_42T4796
• FRU_42T4702
• FRU_42T4751
• FRU_42T4755
• FRU_42T4791
• FRU_42T4793
• FRU_42T4795
• FRU_42T4797
• FRU_42T4817
• FRU_42T4819
• 45N1006

Compatible Models：

Lenovo ThinkPad T420 T420i T430 T430i T510
ThinkPad E40 ThinkPad E50 ThinkPad Edge 0578-47B
ThinkPad Edge 14inch ThinkPad Edge 14inch 05787UJ ThinkPad Edge 14inch 05787VJ
ThinkPad Edge 14inch 05787WJ ThinkPad Edge 14inch 05787XJ
ThinkPad Edge 14inch 05787YJ
ThinkPad Edge 15inch ThinkPad L410 ThinkPad L412
ThinkPad L420 ThinkPad L421 ThinkPad L510
ThinkPad L512 ThinkPad L520 ThinkPad SL410 2842
ThinkPad SL410 2874 ThinkPad SL410 Series ThinkPad SL410k 2842
ThinkPad SL510 2847 ThinkPad SL510 2875 ThinkPad SL510 Series
ThinkPad T410 ThinkPad T410i ThinkPad T420
ThinkPad T510 ThinkPad T510i ThinkPad T520
ThinkPad T520i ThinkPad W510 ThinkPad W520

* Please make sure that the replacement battery you are buying is suitable for your device brand and model.

Battery Care & Maintenance

• Store the battery in a cool, dry environment to maintain long‑term performance.
• Avoid exposing the battery to excessive heat or direct sunlight, especially in warm and humid climates.
• Use compatible LENOVO chargers or certified charging accessories to ensure safe and efficient charging.
• Avoid frequent full discharges; partial charge cycles help extend overall battery lifespan.
• If the battery will not be used for an extended period, keep it at around 40–60% charge before storage.
• Clean the battery contacts periodically with a dry cloth to maintain stable power delivery.
• Do not puncture, crush, or expose the battery to water or high humidity.

Frequently Asked Questions