NiMH Battery Pack: Two 8.4V 4200mAh Battery Packs for RC Car with Capacitors & Female Dean Connector ( 70 D)

These felt sturdy and the glue wasn't old and brittle like the ones I received with Tamiya connectors by mistake. I charged them up and WOW! These packs exceeded all my expectations in terms of the additional power the provided to the motor. Speed increased and the car ran much longer than I thought it would, possibly 20 minutes of casual and speed runs. Long enough that I got tired before the battery drained, which is what I wanted. I have been running these batteries on average 3-4 times a week for about 2 months and I feel they are pretty much the same as they were when I first charged them up. These are relatively cheap packs a reason. The connectors they use to hold the batteries together, the tabs, are very thin and flimsy. They work fine as connectors I'm sure, since the packs work great in providing the power to the truck, but it doesn't look strong and if anything does break, it could be those connectors. I don't mind the thin tabs, it could be by design that they used the thin tabs. The thick heavy duty tabs could make it difficult to fit in the battery slot because of the extra bulk but I think they could have found a way to make it work using the stronger connectors.Overall, I love these batteries.