I've had a jump box in the boat for 6 years. Charge it up once a year at the beginning of the season. It has never been used. Is it still good?

Do you have a battery load tester?

Harbor Freight sells a good inexpensive Chicago battery load tester.

Tom

What type of batteries are in it?

 

https://docs.wixstatic.com/ugd/217982_83299c428cd44d55aba905eef8da0c64.pdf

17 minutes ago, WRB said:

Do you have a battery load tester?

Harbor Freight sells a good inexpensive Chicago battery load tester.

Tom

No load tester

8 minutes ago, Heartland said:

What type of batteries are in it?

 

lead acid

The the battery on your truck and find out it’s still good. ?

14 minutes ago, slonezp said:

https://docs.wixstatic.com/ugd/217982_83299c428cd44d55aba905eef8da0c64.pdf

No load tester

lead acid

Wet or dry cell?

11 minutes ago, Heartland said:

Wet or dry cell?

From the manual I posted Sealed, high energy density, AGM, lead-acid, rechargeable, maintenancefree, 12 volt DC

4 minutes ago, slonezp said:

From the manual I posted Sealed, high energy density, AGM, lead-acid, rechargeable, maintenancefree, 12 volt DC

CHARGING/RECHARGING This product has a sealed lead acid battery. For maximum battery life, we recommend the Jump-Starter be kept fully charged at all times. Recharge before first use, immediately after each use, and once a month if not used. Failure to do this may reduce the battery life dramatically. 

 

This is also from the user manual.  I would guess after 6 years of not doing the above it is probably not in very good shape.

 

 The ones I've had were recommended to be charged every 3 months whether it was used or not.

Might be time for a new one ~

 

https://www.amazon.com/NOCO-GB40-UltraSafe-Lithium-Starter/dp/B015TKUPIC/ref=sr_1_3?crid=PMD8IDAWN4I7&keywords=noco+genius+boost+plus+gb40&qid=1552875525&s=gateway&sprefix=noco%2Caps%2C167&sr=8-3

 

A-Jay

As suggested test it. If the battery is bad it may be cheaper to just replace the battery rather than get a whole new unit. Or keep a short pair of jumper cables in the boat so if the starter battery  died you could start from my trolling motor battery.

Had it plugged in overnight.  It shows an error on the idiot lights. Guessing it's toast. I just bought a 25ft 1 gauge 800 amp set of cables. Free with my Amazon points.