Thread: Sizing TM Batteries

A pair of good quality group 27 batteries is the minimum you want IMHO.

Thanks, PanMan

I had heard Group 27 before, Just didn't know that was related to Amp-Hours.

I would seriously look at the 30 or 31 group. You will always have power all day with them.
I have always used AC Delco, and was just looking and this set are 5 years old and still run all day with no problem. But I think I will change them next month to be on the safe side.

Originally Posted by brushnjigs

I would seriously look at the 30 or 31 group. You will always have power all day with them.
I have always used AC Delco, and was just looking and this set are 5 years old and still run all day with no problem. But I think I will change them next month to be on the safe side.

Thanks for the info. I got a copy of the manual from the vendor. It says at least a 115 AH battery.

According to this link ( Deep Cycle Battery FAQ ), that would be a Group 31 battery.

Thanks

There is one rule for batteries: Get the biggest dang ones you can shoe horn into the space and consider adding more space.

Wannabe...

That is a good link and as it tells you deep cycle batteries are rated in amp hours. This is the figure you want to look closely at. As you know an 80 lb motor is a 24V system and requires 2 batteries. Ideally you want 2 identical batteries (age, size, type and make). Any 2 deep cycle batteries will work. However the smaller they are in amp hours, the less time you will have for trolling. General rule of the thumb is get the biggest (amp hour) that will fit and you can afford. You never know when the fish will turn on big time and you just don't want to have to quit because you run out of trolling power. Also remember the most important things you can do to prolong their life is keep fluid levels up, keep connections clean and tight, and RECHARGE ASAP after EVERY use.

Originally Posted by IBNFSHN

That is a good link and as it tells you deep cycle batteries are rated in amp hours. This is the figure you want to look closely at. As you know an 80 lb motor is a 24V system and requires 2 batteries. Ideally you want 2 identical batteries (age, size, type and make). Any 2 deep cycle batteries will work. However the smaller they are in amp hours, the less time you will have for trolling. General rule of the thumb is get the biggest (amp hour) that will fit and you can afford. You never know when the fish will turn on big time and you just don't want to have to quit because you run out of trolling power. Also remember the most important things you can do to prolong their life is keep fluid levels up, keep connections clean and tight, and RECHARGE ASAP after EVERY use.

AMEN and AMEN.

Originally Posted by IBNFSHN

That is a good link and as it tells you deep cycle batteries are rated in amp hours. This is the figure you want to look closely at. As you know an 80 lb motor is a 24V system and requires 2 batteries. Ideally you want 2 identical batteries (age, size, type and make). Any 2 deep cycle batteries will work. However the smaller they are in amp hours, the less time you will have for trolling. General rule of the thumb is get the biggest (amp hour) that will fit and you can afford. You never know when the fish will turn on big time and you just don't want to have to quit because you run out of trolling power. Also remember the most important things you can do to prolong their life is keep fluid levels up, keep connections clean and tight, and RECHARGE ASAP after EVERY use.

Your exactly right!