stoneworld wrote:My thought would be to check what life you get from a non rechargable battery then consider that a rechargeable is 1.2v rather than 1.5v. It does surprise me that these units are not built with a rechargeable battery pack designed to do many hours of testing.....
led wrote:I have recently had this problem though I suspected it was the new batteries that I used...Perhaps not.
Because of a problem with in situ battery charging which seaward were unable to resolve. I use an external charger, I too would be interested to hear a comment from Seawrd about this problem.
Jim Wallace wrote:All
Several people have comments that when the PT350 indicates that the batteries are low there is still charge in the batteries. This is because the terminal voltage drops to a point where there is insufficient voltage to drive some of the internal components before the batteries are fully discharge. As mentioned above, NiMH batteries have a lower terminal voltage that alkaline cells. Although the microprocessor and most of the electronics can operate down to around 3V, there are other components, in particular relays, that need at least 6V to operate reliably. The battery indicator on the PT350 works on terminal voltage rather than remaining charge - it indicates when the terminal voltage has dropped to a point where operation cannot be guaranteed.
After reports from several users that they were not getting the expected life from the NiMH batteries we carried out a series of investigations. We suspect that the charge sensing on the intelligent charger was not functioning correctly - explaining why users were getting better performance when using a seperate charger. The charger unit used for in-situ charging was modified to increase the charge rate and the feedback from customer trials was that this resolved the issue with the in-situ charging.
I have noted the comments about dedicated battery packs - definately a good idea and food for thought.
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