I just got a PT Tec-40 and really like it. It also puts out great light with NiMH batteries and KPR-103 which is a big plus for me. I've read on the forums that the Tec-40 puts a lot of pressure on the batteries and that has caused NiMH batteries to deform for some users. So I'm interested in preventing that and I've read on the forum that some users have put foil in the bottom of the battery compartment to reduce the battery pressure. [edit: correction - the foil is to improve contact on some batteries, not reduce pressure. Thanks for the clarifications]
I think the spring under the bulb is the key to how much pressure is exerted on the batteries. If a softer spring of the same dimentions could be installed, or the original spring cut shorter, the pressure could be tuned down to a lower level. I'd rather get a softer spring, as that would be a reversible modification.
Has anybody tried to change or modify the Tec-40 spring? Does anybody know how to get an appropriate spring? I looked through my other flashlights for a donor, but found none. I'm going to try Ace Hardware today, but the size is going to have to be very close to fit around the PR bulb base and also inside the bulb holder.
Looking for any advice. Thanks.
I think the spring under the bulb is the key to how much pressure is exerted on the batteries. If a softer spring of the same dimentions could be installed, or the original spring cut shorter, the pressure could be tuned down to a lower level. I'd rather get a softer spring, as that would be a reversible modification.
Has anybody tried to change or modify the Tec-40 spring? Does anybody know how to get an appropriate spring? I looked through my other flashlights for a donor, but found none. I'm going to try Ace Hardware today, but the size is going to have to be very close to fit around the PR bulb base and also inside the bulb holder.
Looking for any advice. Thanks.