At 15:00 08 January 2016, wrote:
Dan,

English not my mother language, sorry.

I occasionally charge my LiFePo4 with a "smart programmable charger" type
iMAX B6. Easy to find online for 25USD. It requires a power input, and a
Pb
battery is very well suited for that.
This way, I need not remove the LifePo4 from the battery tray, nor do I
have to bring mains power to the glider.
Alternatively, the iMax b6AC can be fed both by mains, and by other
batteries, and comes at about 40 USD.

The battery type is:
http://www.aeroakku.com/product_info..._AEROAKKU-LFP-
12-20-NOP.html
As you can see, they state it's a "direct replacement" for a Pb.
I can tell you, with the iMAX I can get it charged a little more (or
"significantly" more, depending on interpretation).
The sailplane also has a solar panel and regulator. I usually select the
avionics batteries for the panels, but occasionally select engine battery
and this also allows a decent charge to the LifePo4.

regards,
aldo

Aldo
I am familiar with the iMax b6 charger, it is widely used by RC enthusiasts
for
charging all types of battery packs, it worries me that you are using a
LiFePo4
pack that does not have a protection circuit built in, I understand how you

are using a PB battery to power the charger, but unless you have BOTH
charge and discharge protection circuits built into your glider that are
tailored
to the correct battery type you are running a risk of thermal runaway and
fire! Lithium batteries of any type are not to be trifled with as more than
one
RC racer has found out.