If yasua are better than powersonic why link to them and not yasua?
Ned
Simple
Yasua are the best .
Yasua will cost a lot more RS list a 6v 4AH bat at 12 pounds .
So let me explain Ned .
When my company fit battery's we don't fit poor quality but we charge a lot more than list price ,hence we use Yasua .
Now in a RC boat were quality does not have to be as high as in industry you can come down a bit quality and get better vaule for your pound.
Now you get in to mid range to good battery and thats were power sonic sit .
Power sonic cost 5.50 pounds Yasua 12 pounds . So buy a power sonic and stick the 6.50 in the bank . when the power sonic fails buy another with the 6.50 . X2 power sonic will last longer than one Yasua.
I deal with company that make mega buck per hour . A battery fault shutting them down would not go down well . On a model boat you will have a reduced running time .
John