40T cycle test

Batteries, Chargers, and Battery Management Systems.
goatman   10 MW

10 MW
Posts: 2327
Joined: Jun 23 2019 6:50pm
Location: Surrey, B.C.

Re: 40T cycle test

Post by goatman » Sep 09 2020 8:35pm

Ive been seeing some odd behavior in two other battery tests and i wanted to check to see if my tester is acting up. the 40T has given a steady result through out this test. i just want to see if the cell mah drops by 10mah/cycle after about 30hrs of cycling

battery has sat for 30 days and voltage was 4.139v, charged to 4.2v

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the settings

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the last cycle, #433 d-3021, c-2980

peak discharge temp is 102f

#434 d-3019, c-2943
#435 d-2993, c-2947
#436 d-2994, c-2950
#437 d-2994, c-2950
#438 d-2995, c-2950
#439 d-2995, c-2952
#440 d-2996, c-2952
#441 d-2996, c-2952
#442 d-2998, c-2953
#443 d-2995, c-2952
#444 d-2996, c-2954
#445 d-2997, c-2954
#446 d-2997, c-2955
#447 d-2998, c-2956
#448 d-2999, c-2956
#449 d-3000, c-2956
#450 d-2999, c-2956
#451 d-2998, c-2956
#452 d-2998, c-2954
#453 d-2997, c-2954
#454 d-2996, c-2954
#455 d-2995, c-2954
#456 d-2996, c-2954
#457 d-2996, c-2954
#458 d-2996, c-2954
#459 d-2996, charging to 3.6v and putting it on the shelf. sept.11/6pm

wanted to check my tester again because i might have some bunk 30q that im testing. oct.03

#460 d-2983, c-2939

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goatman   10 MW

10 MW
Posts: 2327
Joined: Jun 23 2019 6:50pm
Location: Surrey, B.C.

Re: 40T cycle test

Post by goatman » Nov 13 2020 11:17pm

left the battery in the freezer at -10 celsius for 2 days to compare with the P42a heres the link
https://endless-sphere.com/forums/viewt ... 8#p1597148

volt sag

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at 3.65v temp reached 75f

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final temp at 3.2v was 95f

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