This adapter is perfect for wiring two batteries with EC3 connectors together in parallel. Wiring batteries in parallel will increase the total capacity (mAh) while the voltage remains the same. For example, connecting two 11.1V 2000mAh Lipo batteries in series will result in a 11.1V 4000mAh setup.
If you're looking to increase your total voltage and get longer run times, check out our series wiring harnesses. Both series and parallel harnesses are available with Deans Ultra-type, EC3, or XT60 connectors.