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-   -   eneloop battery build (https://www.rcuniverse.com/forum/batteries-chargers-84/11464823-eneloop-battery-build.html)

bipe2 04-01-2013 12:10 PM

eneloop battery build
 
I want to build a rx battery pack with eneloop 2000 mah precharged aa batteries. should i discharge these batteries before i solder them. any help would be great. thank you

Rodney 04-01-2013 01:29 PM

RE: eneloop battery build
 
No need to discharge before soldering them. Do use due caution when soldering though as it is easy to ruin the seal at the positive end if you get it to hot. Make sure every thing is very clean and shiny, put on a bit of flux and pretin the area to be soldered using a heavy duty iron; i.e. one with a lot of thermal mass as you want to heat the local area to be tinned very quickly and then get the heat source removed quickly. Now tin the wire lead to be soldered and lay it in contact with the pretinned cell. Again, using a high thermal mass iron that is up to temperature, heat the two components simultaneously that have been pretinned tinned until you see the solder reflow. No need for additional solder. Remove the heat source from the joint and let it cool. As with any Nixx battery, do a forming charge, even if they are supposedly precharged, before using them. A forming charge is defined as charging at 0.1C for 15 to 16 hours, no need to discharge prior to doing the forming charge.

bipe2 04-02-2013 06:18 AM

RE: eneloop battery build
 
thanks rodney i was really concerned about that. i have built battery packs before but that was a lot of years ago and i just forgot about that discharge thing and i thank you again.


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