[cloudniner]

I like to have a backup battery for my Transmitter. I was having trouble getting the original equipment as they were out of stock. So I went looking and found the battery pack below.

It arrived today and fits in my Tx just fine. It is 3.7volts at 6600mah. Should last all day I would think!

Technical Details

3 x 2200mAh Lithium Ion 18650-sized cells in parallel
Dimensions: 69mm x 54mm x 18mm / 2.7" x 2.1" x 0.71"
Weight: 155 g/ 5 oz
Max charging rate: 3A
Max continuous discharge rate: 6A


https://www.adafruit.com/products/353#tutorials

Price is reasonable as it ended up at $41 with shipping to Canada.

[cloudniner]

FYI

Just a heads up.

When charging this type of battery be sure to use a short charging cable. If the cable has a resistance then the voltage at the charger can be higher than the voltage at the battery pack. Smart chargers will not let the voltage go above 4.2 volts and therefore may cut out before a full charge is obtained.

This condition gets worse as the charge current is increased. I usually charge at 300ma unless I am in a hurry.