On 1/2/2011 10:01 AM, Andrew Rossmann wrote:
I have a battery I bought for an APC UPS about 4 years ago.
I bought 2, and used one immediately.

There's a reason alarm companies change the sealed lead
acid batteries annually. Typical life on them is about
2 years. 4 years on the shelf is well, not good.

Keeping them charged up at all times is the only way to
keep them (or any lead cell) happy and useful.

Jeff