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The battery board plugs into the mainboard and basically just provides power. Running at full power (both RF channels on at all times), the draw is 650mA from 3.7V.
There are 2 board designs available for download, one with a Li-ion battery (nicer, smaller, more expensive) and one for AAA batteries (more basic, cheaper but less convenient). @ 3.7V the current draw is 650mA, at 5V its 500mA so most small batteries will give you about 1 hr of runtime (unless you go for a large li-ion on the order of 1.4Ah which will give you around 2hrs).
Part no. | Name | Description | Distributor | Qty | Cost | Total |
---|---|---|---|---|---|---|
Battery | - | 3.7V/1.2Ah Lithium Ion or Lithium Polymer battery | Battery Space (for example) | 1 | ~$8 | ~$8 |
Battery Protection Circuit | - | Circuitry to keep battery safe (optional but recommended) | Battery Space | 1 | $1.30 | $1.30 |
*LM3622M-4.2 | IC1 | Battery charger chip for 3.7V lithium battery | Digikey Sample | 1 | $2.64 | $2.64 |
Hirose UX60-MB-5ST or *Molex 54819-0572 | J1 | Mini-B USB connector (SMT) | Digikey Mouser Sample | 1 | $0.96 | $0.96 |
163-2217 | J2 | 1.7mm x 5.2mm SMT DC power jack | Mouser | 1 | $0.77 | $0.77 |
STN749 | Q1 | PNP 1A power transistor (SOT223) | Digikey | 1 | $0.79 | $0.79 |
FT232RL | IC2 | USB/ttl interface chip (optional) | Mouser | 1 | $0.30 | $0.30 |
SS14 (for example) | D1 | Schottky Diode (at least 1A/20V) | Mouser Digikey | 1 | $0.16 | $0.16 |
LTST-S320GKT | LED1 | LED (1206) any really, but the recommended one is right-angle mount | Digikey | 1 | $0.16 | $0.16 |
under construction