glider battery duration problems

Dan Marotta wrote, On 10/5/2013 8:22 AM:
This looks very interesting to me:
http://www.bioennopower.com/collecti...ifepo4-battery


On the surface it appears that I may be able to wire two of them in
parallel (or series-parallel if individual cells) and enclose them in
the battery case that fits in the tail of my LAK. I'll measure it today
and see if there's a chance.

Be certain to read the user manual for this battery, which specifically
states series or parallel operation is not recommended! The manual also
states

"Only use 14.6V, LiFePO4 compatible chargers to charge the battery. The
charging current should be between 2A to 5A. If you need a charger,
please contact us"

Don't rely on claims for other Li batteries, like "any lead acid charger
can be used", but only go by the requirements of the manufacturer of the
battery you have.

Lithium based batteries must be taken more seriously than SLA
batteries, which are nearly identical from one manufacturer to another.
Lithium batteries, even LiFePO4, can vary substantially in their
characteristics, particularly with the type of BMS (battery management
system) installed in it, and may not even have one. Even the proper
storage varies considerably between Li and lead batteries.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)