It seems that the best brand is optipower - especially with the discounts through the forum but we am just looking at the different options available. I know this has been discussed before but can't find a specific answer to this query.

What would be the downsides of buying something like this from a lesser known brand:

https://hobbyking.com/en_us/turnigy-...lipo-pack.html

or

https://hobbyking.com/en_us/zippy-co...lipo-pack.html

Does it come down to reliability, safety or performance. Note that you can buy two of the above for the price of one optipower battery. Are optipower twice as good?

Thanks again for the help.