replacement laptop battery pack replace for compaq presario r4000

fit for COMPAQ
346970-001 350836-001 371914-001
378859-001 383968-001 DP390A
HSTNN-DB02 HSTNN-UB02
HP
371913-001 371914-001 378858-001
383965-001 383968-001
HP COMPAQ
346970-001 350836-001 371914-001
378858-001 378859-001 DP399A
HSTNN-DB02 HSTNN-DB03 HSTNN-IB04
HSTNN-UB02 HSTNN-YB02

HP Pavilion ZD 8000, ZD8100, ZD8300/ ZD8200, ZD8400, zv5000, zv6000, zx5000, zx6000 Series;
COMPAQ PP2100, PP2200, PP2210, COMPAQ Presario R3000AP, R3000, R4000, R4100, X6000
Series  Laptop Battery

1 Cells: We use A Grade Cell, and 1 year warranty.

2 Battery Case: The battery case use insulation materials with shockproof, prevent aging, and no easy to damage. First-class and durability.

3 Mother Board: Battery motherboard is designed by ourselves. Special design include automatic protection programs, such as over-charge, over-discharge, over-heart and short circuit protection.

4 A series testing:

1) The first test is to inspect all the cells that whether have stable and ample capacity before assembly. The test time costs four hours.

2) The second test is to test the basic performances of the assembled battery before the aging test.

3) The Third test is aging test, to inspect basic parameters and performances. We do aging test for 72 hours.

4) The fourth test is to inspect all the performances of the battery after fixing procedure.

5) The last test is to inspect the battery whether can work well on laptop after finished all assembly procedures.

5 Low self-discharge: The residual capacity of our battery have more than 90% of the initial capacity after 30 days storage.

6 Charge-discharge can come up to more than 300 times, after 300 times, the residual capacity still have 80% of the initial capacity.

7 6 cells battery, the use time is up to more than 3 hours.