cell reversal when testing runtime

[rmorein]

Doug P.'s reviews of the Fenix lights on flashlightreviews.com reveal a very stiff regulator that drops without warning near cell exhaustion.

I don't understand how cell reversal could be avoided when testing a two cell light with such a stiff regulator, but Doug never commented on it.

This has obvious implications for NiMH use.

Comments?

 

[VidPro]

umm, comments, ok i comment.
all this regulation stuff that is Intended to suck a battery Completly dry, when its batteries in Series, your likly to damage one of the cells when its exausted, from reverse charge.

IF for example a 2 AA unit terminates its load when the voltage is at about 1-1.2v then the liklyhood of reverse charge is way less.

--[Cell#1 1.2V]---[Cell#2 0v]---
VRSES
a unit that can discharge its series set of cells below 1V-.9v.
--[Cell#1 1.2V]---[Cell#2 -.1v]---
(cell 2 going into reverse)

so curcuits that will drain BOTH cells of a Series set of cells are most likly to incurr the reverse charge, and i dont like them.

if the light goes off at around ~1.5v then chances of cell damage of any sort (including leaking alkies) is negligent, and chances that ONE cell is already fully depleated, there is no real reason to continue depleating after that.

if one cell is DEAD, then why continue? because sometimes light is more valuable than the cell

 

[NA8]

if the light goes off at around ~1.5v then chances of cell damage of any sort (including leaking alkies) is negligent, and chances that ONE cell is already fully depleated, there is no real reason to continue depleating after that.

Since the fenix L2D uses the same head as the L1D, I take it there's a problem ? Have L2D users been complaining of NiMh AA's going bad ?

 

[VidPro]

i figured that the 1 OR 2 cell lights (either) would have this issue, what can you do?
the damage to the ni-mhy would likly occur slowly and just result in a cell that isnt up to par, and only when the user drained it completly.
(like i said in the other thread) one advantage of rechargables is recharging it before you go, and rarely getting to a full depleation state.

also as a side note, my enloop things are staying very nicely at the same capacity, even over time, so they have a TENDANCY to die more in unison. i am sure liking that.