Which Battery Tender
Lead Driver
Joined: Nov 2008
Posts: 8,450
Likes: 70
From: South Jersey
i have two battery tender Jr's that i hook my dirt bike battery to, my riding lawn mower, my marine battery for my boat for the trolling motor and every thing is always charged and starts....
More Turbo
Joined: Dec 2013
Posts: 647
Likes: 10
From: SOUTHBURY CT
I have 2 harley`s hooked up to them now and i believe they increase battery life .
Senior User
Joined: Nov 2013
Posts: 163
Likes: 0
From: Albany NY
I use the Juniors and the waterproof 800s.
You don't need the plus for your application being you're just maintaining.
The waterproof 800 is only a few dollars more but what's nice about it is you don't have to plug in the big transformer directly into your outlet. The 800 has a a 3 or 4 foot lead off the transformer. The 800 can literally be submerged in water with no ill affect. Great for my outdoor equipment.
I have 4 juniors and two 800's and switch them around on the below vehicles. All of these vehicles have there share of sitting around and the batteries will sulfate in as little as a year with minimal use. The battery tenders have increased the life of my batteries big time.
2 backhoes
1 dozer
1 excavator
2 ATVs
1 lawn tractor
2 classsic cars
1 Dump truck
You don't need the plus for your application being you're just maintaining.
The waterproof 800 is only a few dollars more but what's nice about it is you don't have to plug in the big transformer directly into your outlet. The 800 has a a 3 or 4 foot lead off the transformer. The 800 can literally be submerged in water with no ill affect. Great for my outdoor equipment.
I have 4 juniors and two 800's and switch them around on the below vehicles. All of these vehicles have there share of sitting around and the batteries will sulfate in as little as a year with minimal use. The battery tenders have increased the life of my batteries big time.
2 backhoes
1 dozer
1 excavator
2 ATVs
1 lawn tractor
2 classsic cars
1 Dump truck
Senior User
Joined: Nov 2013
Posts: 163
Likes: 0
From: Albany NY
form the Battery Tender site...
In Figure 9 we see a pair of 12-volt batteries connected in parallel. This 12-volt battery pack is connected to a single 12-volt charger. Note the blue wire designated W1. The purpose of this wire is to balance the voltage drop evenly across both batteries and each wire during charging. This is not critical for lower current chargers, but when you start to get into the 10 amp and above range, the voltage differential can be significant. The blue wire W1 must be connected to the opposite end of the battery pack as the black wire at the top of the battery pack.
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Junior User
Joined: Apr 2011
Posts: 60
Likes: 2
Works for me. I hope the leads are long enough to pull this off otherwise I'll have to daisy chain another lead.
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i ain't rite
Joined: Mar 2005
Posts: 65,585
Likes: 5,614
From: Marlboro Mental Hospital.
if you are going to mount the unit permanently in the truck, just hook it up to one of the batteries and it will keep both topped off.
i use harbor freight 4 outlet surge protectors these days: Four Outlet Power Strip
and plug both the battery maintainer and the block heater into the surge protector, then run the single wire out the grill.
the one in the 88 has been in there for at least 20 years, the HF one has been in the 02 for 6 years now.
i use harbor freight 4 outlet surge protectors these days: Four Outlet Power Strip
and plug both the battery maintainer and the block heater into the surge protector, then run the single wire out the grill.
the one in the 88 has been in there for at least 20 years, the HF one has been in the 02 for 6 years now.
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