But… an alkaline C has like… oh lets say 8000 mAhs… you are only gonna get the mAhs of the little tiny AA even in the sleeve (with these eneloops that would be 1900 mAh minimum).
@GLaDOS …Maybe we missed the part that says “rechargeable”…? Anyway, 2000+ mAh is plenty for most anything. If the battery runs down, you can recharge it! WOW! OMGWTFBBQH20MGS04 !!!
@GLaDOS You’re both right. Amps are a measure of current, amp-hours are the capacity. A beefier battery can push more current to demanding loads like motors because of its higher maximum discharge rate…
The C rate on a battery is its discharge rate (how fast you can pull power out without damaging the cell).
The capacity of the battery is rated in AH (or for smaller batteries, mah). This is how much power there is. (At least in theory… the faster you pull power out, the less power you get in total.)
Larger batteries do not necessarily have higher C rates.
I have a thing on thingiverse you can make a D out of three AA cells. You need a little wire for that one.
Also a spacer for 18500 cells to replace the 3xAAA batteries in some LED flashlights.
I’ve got an older shower radio (Sharper Image, I think) that takes 4X C-size batteries. This is WAY overkill for the actual power rqmts; std alkalines last something like 2yr. Still, bit of a hassle since I never have that size available when they actually wear out cuz household has NO other usage for that size. I now use AA rechargeables in C-size spacer/adapter; they still last months between swaps.
I make my own spacers from rolled up cardboard.
@baqui63 I did that with a shower radio I had. AA batteries are roughly the same length as C batteries.
@narfcake give or take 0.5mm…
@baqui63 or a bit of aluminum foil, but only on 1 side, I prefer the flat side.
But… an alkaline C has like… oh lets say 8000 mAhs… you are only gonna get the mAhs of the little tiny AA even in the sleeve (with these eneloops that would be 1900 mAh minimum).
@thismyusername To be clear for those that may not know, that means less runtime. As in, fewer hours, minutes or whatever.
@GLaDOS …Maybe we missed the part that says “rechargeable”…? Anyway, 2000+ mAh is plenty for most anything. If the battery runs down, you can recharge it! WOW! OMGWTFBBQH20MGS04 !!!
Size matters
@Veloslave Especially when it comes to the D
sized vs AA. Run times.
D batteries are what makes maglights heavy for clonking fools upside the head.
@medz Exactly why I have one in my car as an Uber Driver. Haven’t had to use it yet. But wouldn’t be afraid to it came to that.
I use these, they take 2x AA batteries for more juice.
http://www.banggood.com/2-AA-To-D-Size-Battery-Holder-Conversion-Adapter-Switcher-Case-p-963039.html
I said it all here. https://meh.com/forum/topics/panasonic-eneloop-battery-power-pack#58200afe0168b95807209df7
TLDR: spacers=bad
the problem is amperage- if you’re just playing a radio or flashlight briefly, no worries. try to run something with a motor, and be disappointed.
@alacrity I think that’s the discharge rate, not mAh.
@GLaDOS You’re both right. Amps are a measure of current, amp-hours are the capacity. A beefier battery can push more current to demanding loads like motors because of its higher maximum discharge rate…
@trisk actually, no.
The C rate on a battery is its discharge rate (how fast you can pull power out without damaging the cell).
The capacity of the battery is rated in AH (or for smaller batteries, mah). This is how much power there is. (At least in theory… the faster you pull power out, the less power you get in total.)
Larger batteries do not necessarily have higher C rates.
I’ve used tin foil
You can do the same with 18650s and 26650s
I’ve seen AA batteries cut open to reveal AAA batteries inside.
I have a thing on thingiverse you can make a D out of three AA cells. You need a little wire for that one.
Also a spacer for 18500 cells to replace the 3xAAA batteries in some LED flashlights.
@PocketBrain Neat it runs the batteries in parallel so they reduce the typical spacer issues like capacity.
I’ve got an older shower radio (Sharper Image, I think) that takes 4X C-size batteries. This is WAY overkill for the actual power rqmts; std alkalines last something like 2yr. Still, bit of a hassle since I never have that size available when they actually wear out cuz household has NO other usage for that size. I now use AA rechargeables in C-size spacer/adapter; they still last months between swaps.