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[Pete Masterson]

Jon,

When you first inquired about 2 batteries, I assumed that was all the batteries you have. When batteries are connected in parallel or in series (or both), then they MUST be identical in all respects -- including age. If the age difference is a few days or a couple of weeks, then it might be OK -- but once a batteries have gone through 2 or 3 charge-discharge cycles, then the older batteries will not respond to the charger in the same way as new batteries (that have not gone through several charge-discharge cycles). You'll end up with shortened battery life and you'll end up spending more later to replace batteries again.

See <http://www.phrannie.org/phredex.html> and read article #5 Batteries and Other Electrical Stuff.

Pete Masterson

'95 Blue Bird Wanderlodge WBDA 42 (For Sale)

<http://www.aeonix.biz/BBforsale.html>

El Sobrante CA

"aeonix1@mac.com"

On Mar 11, 2009, at 4:15 PM, Jon wrote:

--- In "WanderlodgeForum@yahoogroups.com", "Chuck Wheeler" wrote:

As a battery ages the internal resistance increases. This resistance

creates heat when there current flowing during charging or discharging and

this heat boils the water out of the electrolyte. This is why you have

charging problems and shorted life in a mixed set of batteries. You want

all batteries in a set the same age and size.

- Chuck Wheeler-

1982 FC 31SB Fort Worth TX

<snip>

I hope that this difference in age will not affect the battery life of all of all four as I'm not a cash machine! Anyway got to do what a guy got to do!

Jon
1978 Wanderlodge
Bremerton Washington