View single post by davecttr
 Posted: Fri Dec 21st, 2018 01:22 pm
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davecttr

 

Joined: Sat Nov 9th, 2013
Location: United Kingdom
Posts: 493
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Tom, you might want to consider some things.

How long is your typical operating session?

How long would a locomotive be moving within that session?

This Porter loco seems to need about 250mAh of battery to run for one hour.
If it is switched on but not moving the RX/Pololu combination will still draw slightly less then 20mA per hour.

For example if the loco ran for 30 minutes it would use 125mAh,
leaving enough power in the battery to leave it switched on for an additional 6 hours!

If you do a few calculations you might be able to use a smaller battery taking up less space. 

Rather than 1 large battery you can connect 2 or more in parallel and they behave as 1 battery even when recharging.
I think the batteries can even be different capacities as LiPo batteries in parallel will automatically equalise their Voltages.




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Dave
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