A couple days ago my truck would not turn over so I called AAA and they came out and gave me jump. The guy told me my battery did not have a full charge. I drove home, 15 minutes, turned off engine and then restarted it and it fired right up. Later the nite it would not turn over again.
I have a 12v battery charger that I’ve had for years and have never used so I thought I put it to use.
The charger has a 2 amp and 10 amp selector switch and I set it to 2 amp. I connected the connectors and plugged in the charger. There is an analog gauge on the charger labeled DC Amperes that goes from 0 to 15. When I select 2 amp the gauge reads 4 and when I select 10 amp the gauge reads 12.5.
Can someone please explain this. I really don’t want to blow anything up or damage my battery