brightnorm
Flashaholic
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- Oct 13, 2001
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Advanced Polymer batteries: for flashlights?
- Thread starter brightnorm
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lightlover
Flashlight Enthusiast
That one has gone straight into my favourites !
Anyone more knowledgeable than me (lightlover meets demise in the incredible rush ...... ) explain what that could mean for us ?
OK, a tubular flashlight won't particularly benefit from these, but they look good otherwise - or do they ?
lightlover
Anyone more knowledgeable than me (lightlover meets demise in the incredible rush ...... ) explain what that could mean for us ?
OK, a tubular flashlight won't particularly benefit from these, but they look good otherwise - or do they ?
lightlover
If we compare these to MiMH they seem great! I had a look at this site...
The UBC44106102 at the top of the list is rated at 3.8 V, has a 3800 mAh capacity and weighs 108 g.
From the energizer site, their AA 1.2 V, 1600 mAh battery weighs 27 g, so 4 of these AAs weigh the same as one of the above polymer batteries.
The capacity (in mAh) of both batteries is stated for a discharge of 0.2C.
Total energy stored in one UBC44106102 is 14.4 Wh.
Total energy stored in 4 AAs is 7.68 Wh, i.e., (4 * 1.2 * 1600).
So the polymer is about twice the energy density of the NiMH. About the same as an alkaline! (Pelu?)
The max discharge rate of the polymer is 2C, which seems to be a bit less than NiMH which is usually 3C (I think). But since the polymer is twice the capacity, this means the polymer can put out a higher max current than the NiMH.
Cool
The UBC44106102 at the top of the list is rated at 3.8 V, has a 3800 mAh capacity and weighs 108 g.
From the energizer site, their AA 1.2 V, 1600 mAh battery weighs 27 g, so 4 of these AAs weigh the same as one of the above polymer batteries.
The capacity (in mAh) of both batteries is stated for a discharge of 0.2C.
Total energy stored in one UBC44106102 is 14.4 Wh.
Total energy stored in 4 AAs is 7.68 Wh, i.e., (4 * 1.2 * 1600).
So the polymer is about twice the energy density of the NiMH. About the same as an alkaline! (Pelu?)
The max discharge rate of the polymer is 2C, which seems to be a bit less than NiMH which is usually 3C (I think). But since the polymer is twice the capacity, this means the polymer can put out a higher max current than the NiMH.
Cool
