Greg Covey

Great Planes has entered the lithium revolution by packaging the proven Kokam lithium cells under the "ElectriFly" brand name.

The various voltage and capacity packs can be seen at [link=http://www2.towerhobbies.com/cgi-bin/WTI0095P?FVSEARCH=lithium&FVPROFIL=++]Tower Hobbies[/link].

A second connector has been added for charging safety. SmartCharge circuitry insures that every cell takes a charge at the same rate and prevents individual cells from overcharging.

Unique Lithium Polymer power technology offers high energy density, low weight, long life, safe operation, and environmentally friendly chemistry.

halfandhalf825

nice, but whuts the C rating? EX: 6C, 7C, 8C?
thanks

Dopesick

SPECS: Dimensions:
Weight:
Number of Cells: 2, wired in series
Capacity: 720mAh
Volts: 11.1V
Minimum Discharge Rate: 7.5V
Maximum Charge Rate: 12.6V
Maximum Currents:
Charge, 720mA Discharge, 5.8A


this is from a 720mah pack..

After going through the rest of their packs,

looks about like 8C

Greg Covey

Here's a hint: They are re-labeled Kokam cells.

You can find the discharge rating at the FMA Direct site or just divide the maximum current discharge spec. by the capacity.

For example, the [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGHE5&P=7]1500mAh cell[/link] has a max. discharge of 12amps.

12amps = 12,000mA/1500mAh = 8 or 8C

BEC

I wondered if these were Kokam cells. It looks as if they're putting a protection circuit of some sort in them from what the ads say - any info on that?

Greg Covey

Hi Bernard,

My guess is that it is the new cell balancer that Kokam is using but not yet revealing. We will see soon enough.

Regards.

Greg Covey

I received my new 3-cell ElectriFly 1500mAh packs. The Safety and Handling Instructions that comes with the pack is very informative.

The built-in SafeCharge protection circuitry protects every cell in the pack from accidentally being overcharged. This also protects the pack if connected to a non-compatible charger.

The pc board helps to make the assembled pack more sturdy and rigid. It provides a very solid connection platform fo all cells and connectors.

Since I am making a 6s4p configuration from combining eight of these 3-cell packs, I am investigating what happens to the SafeCharge circuitry when charging the entire "super" pack together.