Check the date code on the battery. Example 2018(year) 52(week of the year) BM. Batteries last between 3-5 years from the manufacturing date that includes use or no use.
If you are meaning the AMPS on the battery the higher the Amp Ah the longer the run time.
We would recommend recharging the battery with a partial charger left.
For current warranty information please contact BLACK+DECKER at 1-800-544-6986.
The compatible charger is model number 90604879-01.
If this battery feels warm or hot AFTER USE, it will flash red. The battery must be totally cooled before putting it in the charger.
The battery LBX2040 has a 3 year warranty with us the manufacturer BLACK+DECKER.
It's compatible with the 13 inch lithium 40v weekender. It's also compatible with the 40v lithium leaf blower
No, the 40V system will require a 36V-40V charger.