Should I trickle charge my battery?


#1

I have a 2006 Acura TL with 130K miles that I no longer drive on a daily basis, but am keeping for practical reasons, since my newer car is small sports car. The Acura is not in a garage, but rather exposed to the Texas 95-degree heat. I always drive it at least once a week for errands. Within a month of its semi-retirement, its battery went dead. Repair shop said the charging system was fine and replaced the battery. However within six weeks of replacing the battery, the new one went dead. I assume they are going to scold me about not driving the car enough.

When they replace battery, should I just keep the new one on a steady, constant 2 amp trickle charge? Honestly, I would probably only drive it once a month (bad weather days, hauling big stuff) if I weren’t trying to keep its battery alive. But if a handful of errands once a week isn’t going to get it done, then maybe I should just use it in case of emergencies. But will constant trickle charging be good for the battery?


#2

I use a solar trickle charger that plugs into the lighter socket. Unles I neglect the truck for a year , it is generally ready to go every three months or so for the Home Depot run.
— But ----
With a vehicle parked outside, you should consider covering the tires.
At the same O’Reilly’s that sold me the solar charger, I got RV tire covers for my 79.
They’re sold in pairs for single axle boat trailers and such , so you buy two sets for cars and trucks.
Tape measure the outside diameter of your tires.


#3

Not a trickle (constant amp) charger - use a ‘battery tender’ (I got mine on Amazon). A trickle charger will overcharge a battery eventually.

But driving it once a week (for at least a half hour) should keep the battery charged. I wonder what is draining your battery? Any aftermarket accessories? Alarms? Amplifiers?


#4

Battery Tender is the way to go. Also, most cars the cigarette lighter is not powered when the car is off. That means you can not back feed it with a charger.


#5

A cheap trickle charger plus a household timer set to charge an hour or two per day would do the job.
Draining a new battery in 6 weeks is too soon. You should get a parasitic drain test.
This problem might have been around for a long time, but not show up when driving every day.


#6

I learned the usual hard way that a constant 2 amp trickle charger can boil a battery dry in about 30 days. Please heed the advise of the current (pun intended) posters.


#7

Use a float charger instead of a trickle charger. They are available from .5 amp up to 4 amps and generally cost about 2x as much as a trickle charger, which isn’t that much to begin with. The float charger will shut off when the battery is fully charged and them monitor the battery. When it goes down a preset amount, it will come back on and recharge again.

Battery Tender is a brand of trickle and float chargers.


#8

And, those tenders have also been available at the local China Outlet store. (i.e. Walmart).


#9

Harbor Freight too…Another option, just disconnect the battery…Some may argue that will confuse the computer but I have never had any problems…Your new dead battery should be able to be charged…A new battery will survive this once or twice. It will need 5 amps for 10 or 12 hours. Don’t expect the cars alternator to do it…It may hurt itself trying…