LITHIUM BATTERIES - My FORM Charger is Stuck Flashing Red and Green
Dealing with a charger that won't charge can be perplexing, but understanding the cause often simplifies the solution. In many cases, the root of the problem lies in the batteries themselves, particularly when they're severely depleted.
Commonly Occurs When
- Your cart was driven until it wouldn't drive anymore
- Your cart has not been charged in a while
- An accessory on your cart was left on
The Problem
Lithium (LiFePO4) batteries contain a protection circuit that protects the battery against damage from full depletion, as well as overcharging and other things that could damage the batteries.
This scenario is common, especially in carts that haven't been charged for a prolonged period or have been completely drained. In such cases, a standard lithium golf cart charger is unable to initiate the charging process due to the batteries being "asleep."
How to Confirm
-
Check Voltage: Use a multimeter to check the voltage over the entire battery pack
• If your pack voltage is testing below 2.0V per cell, the battery is likely in sleep mode or damaged - BMS Reset: If the battery has a built-in BMS, try resetting it according to the manufacturer's instructions.
How To Fix
- The following video walks through some ways to wake up a battery that is in sleep mode