Matching lipos

[billydean676]

So here's my problem. Recently finishes a new 35" catamaran. Here is what I have in it
Motor
2850kv
1600 watts
Max current 86a
Max voltage <18.5v

Esc
Sustain current 120a
2-6s lipo
Bec output 5.5v

I was running the boat on two 2s 2000 20c batteries in series. Both runs on the boat for testing props the batteries swole up huge and won't charge. I'm new to boats have been messing with truggies for years. What am I doing wrong? Wrong size batteries or what? Thanks in advanced.

 

[billydean676]

Here's the boat.

 

[tntpoof]

using the wrong C battery try using 100c or even 75c not 20 c... get 2 gens smc 3 cell battery not in the 2000mah range in the 5-8000mah range you puffed batteries by drawing to many amps

 

[billydean676]

using the wrong C battery try using 100c or even 75c not 20 c... get 2 gens smc 3 cell battery not in the 2000mah range in the 5-8000mah range you puffed batteries by drawing to many amps

Great thank s for the info that's kind of why I figured it happened

 

[tntpoof]

you know doing this type of thing can be dangerous ! sorry but whom has a 20c lipo for what a radio? the smallest c rated lipo is a comonsence lipo 3300mah in the 45c rang with 90 c burst for 12 seconds. that battery has always given me more C than I wanted pulled 300 amps from it a few times