During my Ardennes activation I tested my LiPo-packs for the first time.
It is super.
I bought two LiPo packs with 5Ah capacity with 4 cells (4S) = 14,8V , with 15C max. discharge current.
A low C is enough for radio, I do not need more than 15*5=65 Amperes I guess. Max. charge current is 2C, so you can charge them with 10 Amp in a ½ hour if you are in a hurry. ( Cells over 45C are sold also !!! )
More than 5000 mAH is relatively expensive. Better buy two instead.
This equipment is often sold in RC ( Remote Control ) shops, they sell RC- airplanes, cars etc.
I also bought a special charger with 12V DC/100-240 VAC input capable of safely charging almost every type of battery ( Pb, NiCd, NiMH, LiPo etc. ). You always need a special charger charging LiPo.
During use I monitor the voltage with a special monitor with visual and audio alarm. LiPo batteries may never be discharged below 2.75V.
I use a small plastic box for save storage. ( LiPo ,cell monitor and connector inside ), via a hole with a thick wire to the transmitter.
My FT-897D uses 13.8 VDC ±15 %, so with 4 cells (14,8V) I do not exceed the max. voltage.
My old lead ( Pb) battery 7Ah has a weight of 2660g, size 151 x 95 x 65 mm.
Lipo 14,8V 5Ah has a weight of 475 g, size 143 x 51 x32 mm.
Remember that the LiPo batteries can be very dangerous if used in the wrong way.
On the Internet there is a lot of info e.g.
My conclusion so far:
Weight and volume only 25 % of similar PB battery
Easy to charge and monitor
Nearly flat discharge curve
I guess the high end voltage ( 12,0V is save ) means constant output power until the end.
PB 12V 7AH more than 20 EURO, LiPo 14,8V 5AH abt. 33 EURO.
At my site: http://www.smitzeewolde.nl/index.php/2012/07/08/use-of-lipo-batteries/
I hope this info can be useful to you.
73 de Hans PA3FYG/P
*** I updated info on July 15 *******