Less fragile battery

[demoray]

I've apparently killed another Odyssey Extreme battery (AGM16L) by accidentally letting it completely drain.   I've not been able to recover it with my agm capable tender above 6v.

 

So... Having done this to a second of these batteries, I'm looking for a replacement.   What do you all suggest?

[KnifeySpoony]

I think you can kill any battery if let to fully die. However, antigravity lithium batteries have a "restart" protective function if left to discharge too far. Look into it.

[wdb]

Lithium battery will require a battery tender made for that type of battery. 

 

Have you tried a CTEK charger? I've had great luck with them on depleted batteries although I have never tried one on a fully dead battery.

 

Also does your car have a kill switch? If so you might want to start using it.

[Timothy Keith-Lucas]

Hmmmm. Automatic battery chargers require some charge to even work, so keeping a manual charger or a jump-off box around is a good protection. But then, the real question is why is your battery going to zero? It sounds as if your car is using a small current when sitting in the garage. Determine if you have such a drain by running the positive side of the battery through your multimeter set for amperage (sorry if I'm being pedantic here). Wdb shares wisdom in saying that your first defense against such a drain is disconnecting the battery. Another approach is leaving the car on a trickle charger when it is sitting. Actually solving the problem involves finding the drain and stopping it, which is the usual process of tracing backwards until you find something that is "on" when the car is "off." Consider doing that before you ruin another battery.  Any of your battery options will work after you stop that leak.

[KnifeySpoony]

5 hours ago, wdb said:

Lithium battery will require a battery tender made for that type of battery. 

 

 

Only if you let it discharge. As you suggested, a kill switch will eliminate these issues. I always turn my killswitch off and never keep my car on the tender (with antigravity). The restart function hopefully will save my ass if I have a brainfart some day and forget to hit the cutoff switch when I park it up.