Battery charge question
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Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
Battery charge question
Can I charge my batts without disconnecting them, while hooked up in truck or should I disconnect & charge one at a time. Ya- They were stone cold dead this morning.
Cargo Master
Joined: Oct 2007
Posts: 2,712
Likes: 107
From: BoCoMo
the red flag is why were they stone cold dead? Even worn out batts should not have been 'dead' after two weeks of sitting. Either way, time to change out after 5 years imo.
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Cargo Master
Joined: Apr 2007
Posts: 2,333
Likes: 1
From: St. Louis, Mo.
Les- I had been working on the truck over the past week or so & was playing the radio & doors & hood open without starting it. I left the charger on it for 5 hours & fired right up. I'll see how she does after a good run on the highway to recharge them. I am due for new batts b4 any major trips are planned.
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Mountain Pass
Joined: Mar 2012
Posts: 234
Likes: 0
From: SoCal
You can charge the batteries in the truck without disconnecting, but may work better to disconnect depending on the charging capability of your battery charger. My little 1 amp charger never reached the float state, even after 2 days, with everything still connected, though it did charge the batteries significantly. I then bought a 5A charger, and that was much quicker & did reach the flat state within 24 hours (may well have been sooner, I wasn't actively monitoring).
Also, if charging the batteries in the truck, with everything still connected, some battery charger manufacturers recommend you connect the charger across both batteries (i.e. + alligator clip from charger on + terminal on one battery, - alligator clip from charger on the - terminal of the OTHER battery).
Also, if charging the batteries in the truck, with everything still connected, some battery charger manufacturers recommend you connect the charger across both batteries (i.e. + alligator clip from charger on + terminal on one battery, - alligator clip from charger on the - terminal of the OTHER battery).
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Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
I disconnect the driver side postive cable and charge that batt. When it is done I just leave the driver side negative hooke up to charger and hook the positive of the charger to the lifted cable to charge the passenger side. After they are both charged I leave the cable lifted for several hours and check each battery level to make sure they are both close to equal voltage before I reconnect. This way I only half to mess with one connection.
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