Is it better to charge my batteries fast or slow for longevity?

[Eagle 1]

I used a 212 precision for several years . Would fish all day and put on charger at sundown . Was ready every morning at day light .

[Soonerdg65]

Just to chime in, you may already know this. None of those chargers that you listed are what you would call "fast". The 3 bank charger is a cumulative total of 15 amps. It charges at 5 amps per bank. The others would follow suite - total amps divided by # of banks.
My $.02 is get the 15 amp. If i fish twice a week it's usually on Saturday and then Sunday. I like the slightly higher amps to give me more charge over night. Although it usually doesn't give me a full charge. Like said above, takes about 12-15 hours for a full topped of charge.

[Pondfisher42]

keep the receipt on what ever kind of battery you buy I have a Minn Kota digital 315 less than two year old my livescope battery started getting low voltage I replace the battery when I installed the new battery I found out that the charger lead that were feeding that had went bad I had no receipt for Minn Kota charger so they taken the serial number and said it was a 2017 year model so it has been sitting on somebody’s shelf for quite some time my two cents worth


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[Central Minn]

Just to chime in, you may already know this. None of those chargers that you listed are what you would call "fast". The 3 bank charger is a cumulative total of 15 amps. It charges at 5 amps per bank. The others would follow suite - total amps divided by # of banks.
My $.02 is get the 15 amp. If i fish twice a week it's usually on Saturday and then Sunday. I like the slightly higher amps to give me more charge over night. Although it usually doesn't give me a full charge. Like said above, takes about 12-15 hours for a full topped of charge.

I actually it's amps per bank when I bought my 3 bank 15 amp charger it was 45 amps total.