Re: Charging NiMH batteries Message #6 Posted by Vieira, Luiz C. (Brazil) on 16 June 2003, 2:23 p.m., in response to message #5 by Tracy Vermeyen
Hi, tracy;
do you have the means to measure voltage on each battery separately? Each one should measure from 1.25 to 1.3 Vcc right after being fully charged.
I don't know how does the HP PN 92266a charge the batteries, maybe it charges them as a single 5Vcc unit. If it works this way and if one of the batteries is bad, none of the others will be charged accordingly. On the other hand, if it charges them as four 1.25 units (what is better but unlikely), then each good unit will be charged and if there are bad units, they will not.
In any case, all four batteries are used in series when they are in the HP41, and if one of them is bad, BATT annunciator will appear as the set goes close to 4.5 Vcc.
Let us know if you measure the batteries and what you found.
Best regards.
Luiz C. Vieira - Brazil
Edited: 16 June 2003, 2:24 p.m.
|