Car Battery Charger?

[Fireman431]

Re: Car Battery Charger?

You can also go the route of a battery tender. It is a permanently mounted 800mA charger that just plugs in and trickle charges/maintains the battery.

It's about $50.

http://batterytender.com/marine/waterproof-800-usa-western-hemisphere.html

 

[convergent]

Re: Car Battery Charger?

For $100 you can get a good 2 bank in boat charger that pretty much makes the whole battery problem go away. Just plug it in when you park it. Every weekend someone needs a jump at the launch. It's getting kind of annoying because I have a hard time saying no, and we usually have a limited time because of my kids work schedules. It's almost never just the battery and once you start helping is hard to stop. I also don't understand why soany people don't try to start the boat while it's still on the trailer so they can pull it back out easily if it won't start.

 

[MPII]

Re: Car Battery Charger?

I have one of these Harbor Freight jobs on the ignition battery, which is seldom below 80%. If it's deeply down, I use the Schumacher 15 amp unit on it, usually set at 10 amps.

http://www.harborfreight.com/15-amp-three-stage-onboard-battery-charger-maintainer-99857.html

the Group 27 deep cycle batteries have a 10 amp/bank onboard charger/maintainer all to themselves.

The harbor freight and the Schumacher chargers cycle on and off to maintain peak charge, rather than soak. I've lost batteries over the winter with a soak charger, but never with these.

The way battery prices are skyrocketing these days, I think I'll invest in some desulfators.

This charger looks like a real good buy. Is it safe to put this on for two batteries and charge both at the same time? Should this be used during the Winter???

 

[bigbad 4cyl x2]

Re: Car Battery Charger?

i read in my electrical bible book ,that a lot of batteries fail because the plates are not completely covered in water . or they have been charged incorrectly and the plates shed there material losing effectiveness , charged to much and then bowed out so bad the plates touched each other and shorted out etc . it has a section on charging and it is very informative, it says a lot about the special deep cycle chargers that are designed to equalize the cells not just surface charge them . you should really have a good alternator regulator to do this as well . i say get the marine deep cycle specific charger

 

[191Seanymphstriper]

Re: Car Battery Charger?

I have a dual Guess 6 amp battery charger that also maitains automatically as well as is a jumper if left pluged in to crank battery etc. I trust the charger and have no issues! Also I have a older sears 2 6 12 and 100 amp jump start battery charger with 6 volt 12 volt and 12 volt deep charging! It was pritty cheap and if i have a really dead battery or before i put the batterys in the boat when de-winterizing I always give them a good charge with that charger! I agree a deep cycle charger is needed with a deep cycle battery! Unless your charger like my guess does both!