Quote: (Originally Posted by
Mark Chase)
I find it odd the huge number of items i own with batteries in them that don't give me any trouble at all, I have never cleaned a battery contact on any thing before I got the HH and i never had a faulty battery.
ATB
Mark
cleaning the contact is not mandatory, but devices like the HH have high transitory currents (very different requirements from constant draw devices) and a good contact is a must, a little extra resistance means wasted and reduced power.. in theory at 1.2v with the backlight on and the solenoid firing there could be pulses (very short) in the range of 1A.. a poor contact would show here.... so the lower the battery voltage the greater the transitory current needs to be.. use a 3.6v cell and the transitory currents are 1/3 that of the lower voltage cell..
The key to rember is how much current a specific device needs and at what voltage.. for example the solenoid needs about 6v at 100ma, if you source this from a lower voltage source higher current is needed to supply the appropriate power.. so at 1.2v, the current needed would be (6/1.2 ) * current needed at higher voltage- so the solenoid by itself required .5A surges @1.2v! (at 100% efficiency - Not likely) to supply 6v@100ma
The only solution around these issues is not to use primary cells and only use known secondary cells just as Alex advocates.. otherwise the best you can do is take precautions..