Help needed with charging lipo battery

[Mick(soapy)]

I am new to this and I have an overlander 3900 14.8v 4s 25c lipo battery and I would like to know the settings I should use on the fusion LX41B Pro charger.
I know it is a 4cell but what do I charge it at as the charger ranges from 0.1A to 4.0A ? How long does the charge take to get up to max and will the charger stop charging when fully charged?

Mick(soapy)

[sacko]

3.9a.

[paulsouthport]

What heli is this for? Surely not a Trex?

Anyway, set it to lipo balance 3.9A 4 cell, should take about an hour depending on initial charge. I don't know that charger but most (if not all) lipo chargers will taper the charge rate down as the pack voltage nears peak.

[robocow]

http://www.logicrc.com/instructions/O-FS-LX40.pdf

[paulsouthport]

Ah, looking at the manual Robocow has posted, it will only give 1.8A on 4 cell. So at that rate, it could take over 2 hours.
To be honest, it's not a good charger, there's no feedback on the pack state or cell state. OK for really small (cheap) packs but I wouldn't trust it on any of my lipos.

[Mick(soapy)]

Great help, thank you so much.

Mick(soapy)