Canuke
Enlightened
The new lithium-ion jumpstarters
Recently, lithium-ion based car jumpstart units have been hitting the market. http://www.cnet.com/news/pocket-sized-jump-starters/ In addition to these three units, there is also the AntiGravity Batteries Micro Start XP-1, and by now possibly more.
I have one of these, the PowerAll. I haven't risked a teardown, but I can measure the voltage from the 12V jumpstart terminals, and judging from the voltages I find there, these units are using 3.7V LiIon chemistry. The fully charged voltage is 12.6V, exactly 3x4.2V, whereas 4x LifePO4 fully charged would come in at 4x3.6 = 14.4V.... so these are not A123 based.
So are these probably using IMR type cells? Based on reports from users so far, the PowerAll can easily jumpstart 15-20 vehicles on one charge with no ill effects, so whatever's in these can do 200-400A bursts.
Recently, lithium-ion based car jumpstart units have been hitting the market. http://www.cnet.com/news/pocket-sized-jump-starters/ In addition to these three units, there is also the AntiGravity Batteries Micro Start XP-1, and by now possibly more.
I have one of these, the PowerAll. I haven't risked a teardown, but I can measure the voltage from the 12V jumpstart terminals, and judging from the voltages I find there, these units are using 3.7V LiIon chemistry. The fully charged voltage is 12.6V, exactly 3x4.2V, whereas 4x LifePO4 fully charged would come in at 4x3.6 = 14.4V.... so these are not A123 based.
So are these probably using IMR type cells? Based on reports from users so far, the PowerAll can easily jumpstart 15-20 vehicles on one charge with no ill effects, so whatever's in these can do 200-400A bursts.
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