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Higher capacity Li-Po Batteries for handheld? (SOLVED)
MonMotha:
--- Quote from: Necro on April 11, 2011, 09:35:07 pm ---Don't LiIon's have little microprocessors in them to control charging as well so they never go fully dead or overcharge? (either of which kills the battery immediately)
--- End quote ---
So-called "smart batteries" do. These batteries will generally have 5 or more terminals (BATT+, COMMON, SCL, SDA, RTH) rather than 3. Typical Li-Ion batteries rely on an external charger to properly charge them. Most do usually have some sort of "permanent fail" trip (usually a fuse sensitive to both electrical current and temperature) to prevent "venting with flame" and similar malfunction.
I greatly prefer the smart batteries as a designer. They're way easier to work with. However, the "dumb" batteries are quite a bit cheaper in some cases, especially small packs.
Bender:
the batteries I have are 3.7v 2000mha and I'd like to at least double that
I've been able to find 4000mha, and 5000mha C40, for RC cars but don't know how to wire them to the 3 terminals on the handheld or what the "C" rating means
anybody have any ideas?
grasspuddle:
'C' rating is the max charge/discharge current they can give without failing/catching fire.
Search for RC planes and the like. Thats where I got my Li-Polys. And people do put them in Parallel. Just be careful with charging and the current draw.
Bender:
do you know if they come with 2 or 3 contacts?
If 2 how would you wire them to 3 contacts
grasspuddle:
Only Li-Poly i've bought have been to prototype some electronics. They were bare packs with soldered on metal tabs as the +/- connections. You can try looking at the options here:
http://www.sparkfun.com/products/8484
What voltage do you need to power your device? What is the current draw?
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