||I bought two of these Protek batteries and plan on buying more !!
The run times for these packs compared to the E-flights is a LOT better !!
The only problem I've had is that the end caps will pull off if you're not carefull !
Make sure the connections inside the cap are ok then a very small dab of hot glue and you're back in business !!
Other than that these are great packs for your 120 SR !
I'd love to see Protek come out with a pack with even more capacity but I know weight would be a problem.