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Old 12-20-2012, 10:41 AM   #260
Beastly Adventurer
Joined: Sep 2011
Location: Tulsa, Oklahoma
Oddometer: 6,434
Originally Posted by battman View Post

the way i do my cranking load tests is to draw down the voltage to 9V and read the current output
voltage drop under load may not be as important indicator as amp drop due to LiFePO4's very flat discharge curve. the instant battery no longer sustains 200amp... tests are stopped to prevent damage to battery. then fully discharge battery is immediately charged above 12.8v, then allowed to cool for balance of charge cycle to full.

main difference between my LiFePO4 tests and Joel's is the addition of actual amp hour measurements. which require special tools to measure. Joel has nicer Fluke meters than me

discharge tests are well underway for Shorai LFX21, LFX36, Earth-X ETX24, ETX36C. here ...

_cy_ screwed with this post 12-20-2012 at 10:47 AM
_cy_ is online now   Reply With Quote