To start off let's take a closer look at the 2PCS Lipo Batteries with the product number K949-78. These batteries are specially designed for 1/10 RC cars, including the popular models 124016, 124017, 124018 124019, 144001, 144010, 10428 10428A/B/C/A2/B2/C2, and K949. With a capacity of 2200mAh and a 20C continuous discharge rate, these batteries offer reliable and efficient power for extended periods of time.

When put to the test the K949-78 batteries prove to be decent replacements for your RC car. With a true capacity and good looking construction, they deliver on their promise of reliable power. However, after 5 chargings, some users report an internal resistance of 20 ohms per cell which may indicate a potential issue in the long run. Overall, these batteries provide good performance and extended run-time for your RC car.

One potential drawback of the K949-78 batteries is their reported internal resistance after multiple charges. However they make up for it with their true capacity and reliable power delivery. Another advantage is their compatibility with a wide range of popular RC car models, making them a versatile choice for enthusiasts.

In conclusion the K949-78 7.4V 2200mAh 20C 2S T Plug Lipo Batteries offer a good balance of performance and versatility for 1/10 RC car enthusiasts. Despite the potential issue with internal resistance after multiple charges, these batteries deliver on their promise of reliable power and extended run-time. If you're looking for a top-quality replacement for your RC car, the K949-78 batteries should definitely be considered.