Batteries Will Not Take Charge

[Lenny_K]

I have a friend that has a Chinook Class B with two 12v batteries that will not take a charge over 13.4v even with a 40 amp battery charger attached. Needless to say they wake up in the morning to low battery beeping sounds.
Any ideas why they will not take over 13.3v charge.

[Lenny_K]

rk911 wrote:

Dakota98 wrote:
Are these Lead Acid or AGM ?

Are "all connections" clean ?

and if not maintenance free check the cells with a hydrometer. how old are the batteries?

I don't have a hydrometer with me and the doesn't have one either and I don't know the age of the batteries.
I've been after to have a load test done on them but he hasn't to date.

[Lenny_K]

MEXICOWANDERER wrote:
If they are dead they will bubble vigorously at 13.4 volts. Dead meaning battery recycler time. Time to have them tested...

I'm thinking they are dead also but why will they not take a higher charge?

[Lenny_K]

Dakota98 wrote:
Are these Lead Acid or AGM ?

Are "all connections" clean ?

Lead acid and connections are clean.

[rk911]

Dakota98 wrote:
Are these Lead Acid or AGM ?

Are "all connections" clean ?

and if not maintenance free check the cells with a hydrometer. how old are the batteries?

[MEXICOWANDERER]

If they are dead they will bubble vigorously at 13.4 volts. Dead meaning battery recycler time. Time to have them tested...

[Dakota98]

Are these Lead Acid or AGM ?

Are "all connections" clean ?