Milwaukee Power Tool Li-Ion Cells
11-01-2006, 05:34 PM
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Milwaukee Power Tool Li-Ion Cells
There's been a bit of buzz about the Li-Ion cells found in some new power-tool packs.
Could not resist, so I grabbed a couple on eBay. Milwaukee brand.
They take a bit of work to get apart, but now that that's done, my flash report points are:
1. There are 7 cells in a pack, and packs cost about $80 - $90 on eBay.
2. Cells are nominally something like 3500mah, so they are cheaper per AH than Lipos.
3. They are a bit heavier and bulkier, being a steel-can cell.
4. So far, I've been able to pull 38 amps from them for as long as I'm willing to keep the load on, (as measured thru my Whattmeter - I don't have a computer DAQ setup, so don't look to me for graphs.)
5. Made in CANADA. (Interesting!)
A 2S2P pack will be flying in one of my sport motor-gliders soon. Max motor draw 38 amps static. So in theory I could run a 1S2P but I need the weight for balance. Might as well make it work for a living!
Has any of the serious battery-evaluators done any real testing on these? The do look promising. Especially for us sport types who get grumpy when a big Lipo pack has to be scrapped because it got dropped and one corner is crushed.
Could not resist, so I grabbed a couple on eBay. Milwaukee brand.
They take a bit of work to get apart, but now that that's done, my flash report points are:
1. There are 7 cells in a pack, and packs cost about $80 - $90 on eBay.
2. Cells are nominally something like 3500mah, so they are cheaper per AH than Lipos.
3. They are a bit heavier and bulkier, being a steel-can cell.
4. So far, I've been able to pull 38 amps from them for as long as I'm willing to keep the load on, (as measured thru my Whattmeter - I don't have a computer DAQ setup, so don't look to me for graphs.)
5. Made in CANADA. (Interesting!)
A 2S2P pack will be flying in one of my sport motor-gliders soon. Max motor draw 38 amps static. So in theory I could run a 1S2P but I need the weight for balance. Might as well make it work for a living!
Has any of the serious battery-evaluators done any real testing on these? The do look promising. Especially for us sport types who get grumpy when a big Lipo pack has to be scrapped because it got dropped and one corner is crushed.
