Hi,
I have done some thread searching, but have not found out much about voltage issues with Sanyo eneloops (except the fact that the voltage doesn't 'sag under load', whatever that means. If someone writes 'The Idiot's guide to EE', I will buy it).
I'm just starting out with Nimh rechargeables, and am not diving into lithium rechargeable chemistry yet. I just bought a dozen Eneloops, and am trying to find creative ways to utilize them besides my AA and 2xAA lights.
I would eventually like to try running a Malkoff M30 or M30w off of eneloops, but its hard to find them right now.
All of the eneloops that I now have, I first 'slow-charged' on a Maha MH-C401SF, that has separate charging bays. Although they are supposed to be 'pre-charged', the Maha indicated that all of them needed to be charged, and 3 charges (4 X AA) took several hours each.
I have bought a number of SureFire incan lights, either new or used, and immediately swapped out the lamp assembly for some sort of led unit. I did not keep track of which P60s were from used lights (silly, I know), and which were new. Last night I put a P60 assy. in a 6P + A19 + A14 + A14 + A14, which makes it about the right length for 5 eneloop AAs. I was thinking (caution: newb thinking ahead) that 5 X 1.2 volts = 6 volts, and since the P60 is rated for 6 volts, I'm going to get the maximum performance possible, at quite possibly a comparable runtime. I turned it on very briefly a few times, and headed out with it, to take the dog for a walk. Used it for maybe 30 seconds crossing a street, then again for about 60 seconds testing the throw in a field. About a block later, I started to use it again, fumbled with the momentary (thumb slipped off of the end of this 'baton', and then tried to use it on momentary again, and nothing happened. When I got home, I tried the same lamp assembly in a Z2 with CR123a primaries, and it didn't work in that either, so the lamp is definitely dead now.
There are 2 possibilities that I can think of:
1) The P60 was at the end of its life and finally just died.
- or -
2) I am unaware that AA Eneloops can actually be charged above 1.2 volts, and that the small amount of 'overvoltage' (my term), multiplied times 5, fried the lamp assembly.
I then took off one of the A14 extension tubes so that I only had 4 Eneloops in a row, and the next spare P60 I put in seems to work fine, so far.
My question is, can Sanyo Eneloops be charged above 1.2 volts? One of the threads mentioned, in passing, a terminal cut-off charge of 1.47 volts for the Maha C-9000. Does that mean that my Eneloops might have approached that level in my MH-C401FS? I don't mind blowing a spare P60 so much, but I was thinking of hooking up 4 eneloops to a Malkoff M30 (4 x 1.2 = 4.8), and I sure don't want to fry a Malkoff.
Thank you!
I have done some thread searching, but have not found out much about voltage issues with Sanyo eneloops (except the fact that the voltage doesn't 'sag under load', whatever that means. If someone writes 'The Idiot's guide to EE', I will buy it).
I'm just starting out with Nimh rechargeables, and am not diving into lithium rechargeable chemistry yet. I just bought a dozen Eneloops, and am trying to find creative ways to utilize them besides my AA and 2xAA lights.
I would eventually like to try running a Malkoff M30 or M30w off of eneloops, but its hard to find them right now.
All of the eneloops that I now have, I first 'slow-charged' on a Maha MH-C401SF, that has separate charging bays. Although they are supposed to be 'pre-charged', the Maha indicated that all of them needed to be charged, and 3 charges (4 X AA) took several hours each.
I have bought a number of SureFire incan lights, either new or used, and immediately swapped out the lamp assembly for some sort of led unit. I did not keep track of which P60s were from used lights (silly, I know), and which were new. Last night I put a P60 assy. in a 6P + A19 + A14 + A14 + A14, which makes it about the right length for 5 eneloop AAs. I was thinking (caution: newb thinking ahead) that 5 X 1.2 volts = 6 volts, and since the P60 is rated for 6 volts, I'm going to get the maximum performance possible, at quite possibly a comparable runtime. I turned it on very briefly a few times, and headed out with it, to take the dog for a walk. Used it for maybe 30 seconds crossing a street, then again for about 60 seconds testing the throw in a field. About a block later, I started to use it again, fumbled with the momentary (thumb slipped off of the end of this 'baton', and then tried to use it on momentary again, and nothing happened. When I got home, I tried the same lamp assembly in a Z2 with CR123a primaries, and it didn't work in that either, so the lamp is definitely dead now.
There are 2 possibilities that I can think of:
1) The P60 was at the end of its life and finally just died.
- or -
2) I am unaware that AA Eneloops can actually be charged above 1.2 volts, and that the small amount of 'overvoltage' (my term), multiplied times 5, fried the lamp assembly.
I then took off one of the A14 extension tubes so that I only had 4 Eneloops in a row, and the next spare P60 I put in seems to work fine, so far.
My question is, can Sanyo Eneloops be charged above 1.2 volts? One of the threads mentioned, in passing, a terminal cut-off charge of 1.47 volts for the Maha C-9000. Does that mean that my Eneloops might have approached that level in my MH-C401FS? I don't mind blowing a spare P60 so much, but I was thinking of hooking up 4 eneloops to a Malkoff M30 (4 x 1.2 = 4.8), and I sure don't want to fry a Malkoff.
Thank you!
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