Battery Tender Question

[emgeesea]

@emgeesea i am curious to see what their reply is

Here is one person's opinion, from a related forum (regarding using 1 battery tender)...

This will work, but if your maintainer has any intelligence for battery maintenance, it won’t be able to perform those tests against both batteries.

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[Htfan]

Here is one person's opinion, from a related forum (regarding using 1 battery tender)...

Yes, I also believe this is true depending on the intelligence of the tender. This is why I separate the batteries on occasion and run the tests independently.

 

[nerubi]

Just bought a battery charger/tender because ESS wasn't working. Dealer checked and said everything ok but not driving it enough. Said to get a tender.
Instructions say to hook the negative clamp to the engine or frame. Where would that be best?
It also has ring connectors it says can connect to the positive and negative battery terminal studs. Which are better to use clamps or rings?

 

[WranglerMan]

Just bought a battery charger/tender because ESS wasn't working. Dealer checked and said everything ok but not driving it enough. Said to get a tender.
Instructions say to hook the negative clamp to the engine or frame. Where would that be best?
It also has ring connectors it says can connect to the positive and negative battery terminal studs. Which are better to use clamps or rings?

I connected my ring connectors to the main battery +/- and then just use the quick connector for my tender, I don’t charge the batteries separately and ESS works fine when I choose to test it once in a while and when I do on occasion check my battery voltages I check them separately and both are fairly close to each other on voltage

 

[Blu bi Kong]

My battery tender of choice.
https://photos.app.goo.gl/5ef4NypyLK2H4M8i8

 

[damageinc321]

After having my batteries die and be replaced 2x I've decided I'm going to get a Noco genius 10 charger. I plan on using it when I'm out of town for a week or more. I've read that if you connect the charge to the negative terminal on the main battery and the N1 terminal on the fuse box I will be effectively charging both batteries. Is that correct.I know when my batteries were totally failed last time this method was the only think that worked to jump the Jeep.

 

[Pismo61]

Ive always had mine connected to the Pos. and Neg side of the battery.Seems to work.Following maybe there is a better way.

 

[Jebiruph]

After having my batteries die and be replaced 2x I've decided I'm going to get a Noco genius 10 charger. I plan on using it when I'm out of town for a week or more. I've read that if you connect the charge to the negative terminal on the main battery and the N1 terminal on the fuse box I will be effectively charging both batteries. Is that correct.I know when my batteries were totally failed last time this method was the only think that worked to jump the Jeep.

Jumpstarting from N1 is different than charging. If you are not disconnecting the batteries to charge them separately, connect the charger th the main battery and both batteries will get charged.

 

[melendez69]

This one's only about 2 months old, but I'd rather not start a new thread since there's already a few dedicated to battery maintenance.

I've had the Genesis dual battery kit/Optima Red Tops for some years now, and I have 2, 5, and 10 amp Noco maintainers for different vehicles. I initially mounted the 5 amp to my JL, and a couple months ago I replaced it with the 10.

Since the Optimas are 44 ah each, is the 10 amp a bit much on a pair of 44 ah batteries?

 

[WranglerMan]

This one's only about 2 months old, but I'd rather not start a new thread since there's already a few dedicated to battery maintenance.

I've had the Genesis dual battery kit/Optima Red Tops for some years now, and I have 2, 5, and 10 amp Noco maintainers for different vehicles. I initially mounted the 5 amp to my JL, and a couple months ago I replaced it with the 10.

Since the Optimas are 44 ah each, is the 10 amp a bit much on a pair of 44 ah batteries?

I would think the NOCO 10 is fine since the combined ah rating is 88, I was using an Odyssey 20 amp on my Full River 750-25’s and likely cooked mine so with my new ones I'm using solely the NOCO as the charging profile is a lot less aggressive.

 

[melendez69]

I would think the NOCO 10 is fine since the combined ah rating is 88, I was using an Odyssey 20 amp on my Full River 750-25’s and likely cooked mine so with my new ones I'm using solely the NOCO as the charging profile is a lot less aggressive.

I was of the believe the combine rating would make the NOCO 10 sufficient, but I didn't want to swap the chargers a second time & needed a little reassurance... Thank you

 

[WranglerMan]

I was of the believe the combine rating would make the NOCO 10 sufficient, but I didn't want to swap the chargers a second time & needed a little reassurance... Thank you

You mentioned you run a Genesis duel battery system so IMHO you are safe to run a 10 amp NOCO Genius 10.

You have to remember that once the Cole Hersee relay sees 13.2 volts for approx 2 mins it tells the solenoid to close connecting the two batteries together, its still 12 volts but it combines the CCA’s and ah ratings.

I initially used a NOCO 10 on my duel setup but then started using an Odyssey 20 and it ruined my batteries, I spoke to another member here who's an engineer and has designed and built batteries and he advised that the Odyssey 20 is fine if you have depleted the batteries down a lot but is to aggressive for maintenance charges and advised the Odyssey charger has a fast aggressive charging profile and the NOCO 10 is ideal as its a softer charge and has a smoother charge profile.

 

[melendez69]

You mentioned you run a Genesis duel battery system so IMHO you are safe to run a 10 amp NOCO Genius 10.

You have to remember that once the Cole Hersee relay sees 13.2 volts for approx 2 mins it tells the solenoid to close connecting the two batteries together, its still 12 volts but it combines the CCA’s and ah ratings.

I initially used a NOCO 10 on my duel setup but then started using an Odyssey 20 and it ruined my batteries, I spoke to another member here who's an engineer and has designed and built batteries and he advised that the Odyssey 20 is fine if you have depleted the batteries down a lot but is to aggressive for maintenance charges and advised the Odyssey charger has a fast aggressive charging profile and the NOCO 10 is ideal as its a softer charge and has a smoother charge profile.

Despite my typos leading to uncharacteristically poor grammar, thank you for the additional info. I have voltage anxiety and big numbers sometimes concern me.

 

[BRuby]

For the past 6 years have charged the puny aux and main separately with NOCO 5 and 7200. Zero problems. Always separately repair desulphate. Do this for all my vehicles - zero problems. But understand the reluctance and extra work to disconnect and buy another smart charger. Often my vehicles are stored months at a time and when operational are driven infrequently and only as needed. Since most my daily travel is now by unrestricted e-bike which is a ton more fun. Wearing D3O moto gear and DOT helmet. WTF.

Last battery changed out was Porsche that lasted only a shitty 12 years. But that was on a shitty CTEK that had no repair mode. Bought a NOCO 10 so the CTEK is now sitting lonely as a spare. Porsche branded the base CTEK and sold it as the prescribed charger for a BS 4x markup. Yeah have 5 NOCOs and 2 CTEK - all very shitty smartchargers.

Poor lonely CTEK. But really continue to charge together. No argument there. To each their own. Haha!

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