battery calibration??

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how do u guys get your batt to 12volts, the control and app still say 13 something and even a multimeter and its low enough to where the lights blinks and turns off, im wanting to do a battery calibration, also running the sidepilot app, don’t have any androids
 
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If you've gotten to the point that the battery is shutting down, then you can start the charging calibration. Sounds like you have a crapping battery, but try a calibration charge.

I'm not sure of the correct term, but the battery has a "hysteresis" when draining under a load. Once the load is removed and/or that the battery cools, the voltage will rise a certain percentage...maybe a single volt, just depends.

As to how to drain, several threads here prescribe various methods, just depends on what is easiest for you. I use a series of 12vdc auto lamps, about 160W worth, to drain the batteries down to 50% for storage. I guess the same tool could be used for re-calibration discharging.

When discharging, the individual cells should be monitored rather than an overall voltage. 12v divided by 4 cells is 3vdc per a cell. If you have a "deader" cell you could easily damage it further by taking it below 3vdc. 3.1 + 3.1 + 3.1 + 2.7 = 12

I think Solex has the best method, at least from what I've read. If you don't have Solex, then you have other options...search is your friend.
 
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thank u Rich, no the battery seemed to be working fine i just read that you should do that to the batts everynow and then to hopefully make them last longer, i wish i had a way of checking each individual cell, i get what u mean about the load, make perfect sense, i let the battery rest for a little over 5 hrs now i hooked it up to the charger, i’ll leave it for 48 hrs, hopefully its just something to make them last longer,

thank u for ur response, this forum has been really helpful
 

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