Holding absorb time requirement depends on how mis-balanced the cells are. Battle Born recommendation is based on a battery that has regular balancing with full charge to 14.2v during regular recharge cycle.
The balancing dump resistor in Battle Born 100 AH battery is only 77 ohms. This is about 45 mA of balancing dump current. Depending on level of bulk charging current, you will start to have BMS cell overvoltage shutdown issues when attempting a full absorb level charge, when the balance in SoC between cells gets exceeds about 1% of capacity between the four cells.
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1% of 100 AH battery is 1 AH SoC delta between cells. To get balanced again with only 45 mA of balance dump current requires 1 AH/0.045A balancing dump = 22.2 hours held at 14.2 vdc.
Main issue with self-contained 12v LFP battery with no BT RF monitor link is you are flying blind, not really knowing the difference in cell voltage. Only indication of mis-balancing is when you get a BMS cell overvoltage charging shutdown when attempting a full absorb voltage level charge, and you detect less extractable capacity from battery due to cell imbalance. If balance gets bad enough for you to notice less extractable capacity you are really imbalanced, maybe as much as 5 or 6% off in cell SoC balance. This can take a week to get back in balance.
Using battery at high discharge current accelerates cell misbalancing. Running high discharge rates and not fully charging battery will get you in trouble quickly.
