Thread: SLA Battery Charging

Settings look correct to me

That's what I thought. I have another charger that gets them up to 12.9 volts every time, with what I'm pretty sure are the same settings. Would using the 10 amp setting for a short period of time help at all?

I'm an "idiot" when it comes to this kinda stuff .... BUT, how would a 7ah battery be considered "deep cycle" ?? My next concern would be .... is that charger the right one to use on a 7ah lithium battery ?? (assuming, of course, that the 7ah battery IS a lithium battery)

Originally Posted by CrappiePappy

I'm an "idiot" when it comes to this kinda stuff .... BUT, how would a 7ah battery be considered "deep cycle" ?? My next concern would be .... is that charger the right one to use on a 7ah lithium battery ?? (assuming, of course, that the 7ah battery IS a lithium battery)

I was told by a friend that they are indeed considered "deep cycle." Below is an example of the one I have, Sealed Lead Acid not lithium.

https://www.academy.com/p/game-winner-12v-7-ah-rechargeable-battery

12.6 volts is a fully charged battery. When they get higher its just a surface charge and will go down pretty fast.

Originally Posted by Barnacle Bill

12.6 volts is a fully charged battery. When they get higher its just a surface charge and will go down pretty fast.

Great SA on this. So, is it normal for them to end up around 12.2 volts by the end of a trip that's a few hours long? The batteries I'd seen that started around 12.9 seemed to end up about 12.5 or so by the end of the same timeframe. Same kind of batteries with similar use histories

You can’t rely on the voltage reading of your electronics to determine battery state of charge. A meter on the battery terminals is the accurate way, or a 4-wire remote measurement to eliminate the voltage drop in the wiring.

At the completion of charging and for several hours afterward or until you use the battery, you should see more than 13V on the battery. Because your battery is intended to be charged at 14.7V, it should measure 14.7V at the completion of charging assuming your charger doesn’t have a float stage. If your charger goes higher than 14.8V, it can damage the battery.

Your battery is made by UPG, and their model number for it is UB1270. They don’t publish the open circuit voltage for it, but most AGMs run about 12.8-12.84V as the full charge voltage. Anything less and you aren’t at full charge.

Your battery is not a deep-cycle battery for charging purposes. The deep-cycle switch on your charger is not really helpful, and I have doubts your charger is appropriate for an AGM and wouldn’t use it without verifying the output. You need 14.6-14.8V at no more than 2.1A to charge the battery.

Originally Posted by CatFan

You can’t rely on the voltage reading of your electronics to determine battery state of charge. A meter on the battery terminals is the accurate way, or a 4-wire remote measurement to eliminate the voltage drop in the wiring.

At the completion of charging and for several hours afterward or until you use the battery, you should see more than 13V on the battery. Because your battery is intended to be charged at 14.7V, it should measure 14.7V at the completion of charging assuming your charger doesn’t have a float stage. If your charger goes higher than 14.8V, it can damage the battery.

Your battery is made by UPG, and their model number for it is UB1270. They don’t publish the open circuit voltage for it, but most AGMs run about 12.8-12.84V as the full charge voltage. Anything less and you aren’t at full charge.

Your battery is not a deep-cycle battery for charging purposes. The deep-cycle switch on your charger is not really helpful, and I have doubts your charger is appropriate for an AGM and wouldn’t use it without verifying the output. You need 14.6-14.8V at no more than 2.1A to charge the battery.

Got it, excellent info. So this appears to be my charger- is it not appropriate for charging said batteries? Would it help to switch it from "deep cycle" mode to "all others?"

https://www.ebay.com/p/1234772570