Originally posted by lesmore49 I find whenever you utilize cookies to provide the viewer an idea of the size of the object of interest...I find I get very hungry.
Les
Cookies also provide google with an idea of the size AND objects of your interest. By coincidence, it too, is hungry.
My 1930's AVO light meter arrived with the needle sheared-off in transit! £1.25 wasted... that could have bought me FIVE cookies! Big ones! With giant chocolate chips!
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Originally posted by Just1MoreDave Learn More About FLEXVOLT® 6.0, 9.0, & 12.0 Ah Batteries | DEWALT
They are all groups of cells anyway. So why not have three larger groups, and when the battery connects to the tool, the connection is switched from groups in series to groups in parallel? Lithium ion batteries already require attendant circuits for proper charging and less fire. Seems easy to me.
While it'd work from a voltage perspective, the current delivery for the series cells would be proportionally smaller for higher voltages - on the flip side, the total capacity would suffer for the parallel cells. As motors are current-driven devices, it might be problematic at higher voltages where the current would fall off, resulting in reduced power. The circuitry would also have to handle current sharing to avoid damaging the cells as well to avoid uneven discharge and overdraining some of the cells (in LiPo batteries that becomes dangerous) - extra cost and complexity.
Another problem is that the cells are likely already in a parallel configuration of series cells - so creating extra combinations would require extra volume (and weight). Any switching circuitry is an extra point of failure too.
The greatest single argument against that idea is "I can make more money selling two batteries with simplified construction than I can with one battery and complex construction". It's doable from a technical perspective, but whether it'd be worth all the engineering challenges for the sake of convenience is completely overshadowed by whether or not it favours the company producing the battery itself. It probably wouldn't... but a multi-voltage mains adapter might!
Market forces trump engineering every time... It sucks.