Dual purpose battery question

[RedRob]

I just recently learned about the existence of dual purpose batteries. I’ve never had a battery problem, but the idea of becoming stranded in the middle of nowhere gives me some degree of not entirely unreasonable anxiety, and this seems like a reasonable way to address the issue without going to a full two-battery setup.

In reading reviews of various batteries there is a repeating theme of a small but significant minority of people who had bad experiences, as is common with many consumer products these days. Many of the dissatisfied people blame the idea that they didn’t know that they needed a special charger for the battery. Manufacturer websites indicate you don’t need one, but Optima, for instance, will extend your warranty if you buy their fancy charger.

What has been your experience with running with one dual-purpose battery with no special charger? (FWIW, my Tacoma says it has a 130 amp alternator.) What has the lifespan been? Would you recommend a battery like this to some stranger on the internet? How about to your daughter who wants to try solo overlanding?

Thanks

 

[Overland A Far]

Hmmm. I've used dual purpose batteries on my boat (starting and deep cycle) with no problem and the charger on the boat motor is nothing special. I also used one as a second battery in my off grid unit - linked with a solenoid and no issues. If you are going for a second battery for insurance and not really because you need the power then I would opt for a compact and quality compact booster unit (Noico or other brand). Not as costly as a good dual purpose battery, compact, ultra light and they work great. And can be charged by your vehicle or other power supply. For a second battery on my boat or as insurance I pack a 600 amp compact battery booster pack (lunch box size) - light, easily carried, multi use and again can be charged by the 12 or 110 volt systems.

 

[RedRob]

Thanks for your answer. I have researched boosters and every single one, and I mean every one, and I’ve looked at a lot, has a small but significant minority of people who have serious problems with them. This has moved me away from that as an option. I don’t want to be the guy who gets the lemon and doesn’t know it until it’s too late.

Dual purpose are expensive, that’s for sure. I’m not thinking about a second battery but about using one as my only battery.

Thanks again.