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Gentlemen - 

I have recently purchased a new old stock premiere DC-3 rail inspection car     (20-2242-1) PS 2

Tested and everything runs fine.  During lubrication I have discovered it has the dreaded 8.4 V battery.  I have removed it and want to replace it....what are my choices for replacement?  

 

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A new NiMH battery will likely last 7-8 years. Consider your 5 v board may fail at any time then you have a BCR with no place to put it.
FWIW I just picked up a PS2 5 v engine from 2001. It had a white battery which may have been original as the engine was used for display only. It measured about .6v and was replaced with a NiMH battery I had. I decided to try and see if the old battery would take a charge and was surprised it did. Its been holding for a week. I don’t plan to use it but it could be used in a pinch.

Pete

@Norton posted:

I decided to try and see if the old battery would take a charge and was surprised it did. Its been holding for a week. I don’t plan to use it but it could be used in a pinch.

For around $3 for a new NiMh 9V (8.4v) battery, I can't see taking the chance, if I see a white or silver 9V battery in an MTH locomotive, it's the first thing to hit the trash can.  I don't really care if it holds a charge, it never gets the chance here.

Not sure of the downside of charging or not charging a NiMH. I hadn’t charged the one I had for two years. Put in the engine and it was found. Check it with a voltmeter first. 8 volts or above is Ok.

BTW the white batteries are NiCads. Same applies though. 8 volts or above is OK you won’t blow up the engine. Don’t use the charge circuit in the engine if the voltage is below 8 volts though.

Pete

Last edited by Norton
@Norton posted:

Not sure of the downside of charging or not charging a NiMH. I hadn’t charged the one I had for two years. Put in the engine and it was found. Check it with a voltmeter first. 8 volts or above is Ok.

BTW the white batteries are NiCads. Same applies though. 8 volts or above is OK you won’t blow up the engine. Don’t use the charge circuit in the engine if the voltage is below 8 volts though.

Pete

I've had a lot of BAD batteries that will hold a voltage above 8 on a meter. When they go under load the voltage drops rapidly to 5 or 6. To truly test these batteries, you need to apply about a 100ma load and monitor the voltage for about 15 seconds. If it stays above 8, then you have a good battery.

My worst experience with a battery is one that sat long enough that the polarity on it reversed. When the PS1 engine was started, Magic smoke rolled out a few minutes later.  Somehow the board and charging circuit still worked after a new battery was installed.

Last edited by H1000

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