Upgrade Genuine Skyrc Imax B6ac + V2 Dual Power (6amps, 50watts): Lipo, Liion, Life, Nicd, Nimh, Pb Lead Acid Ac/dc Professional Rc Balancing Battery Charger & Discharger - addpoweradd EXCLUSIVE Genuine, Authentic, Original iMax B6AC V2 Charger by SkyRC w/ Anti-Fake Holographic Serial Number on the back of the charger. This number can be inputted into SkyRC's website to prove its authenticity. LITHIUM BATTERY METER: Plug your LiPo/LiIon/ LiFe balance plug into the charger and use the battery meter as a voltage tester to quickly see the voltage readings from each cell. INTERNAL RESISTANCE METER: Use this function to measure the resistance in each of your lithium battery's cells. This helps determine the health of your cells, to be sure you are getting the most power out of them. TERMINAL VOLTAGE CONTROL: The voltage at which the charger cuts off the charge to each cell can be adjusted. LiPo 4.18V-4.25V (Default 4.20V) / LiIo 4.08V-4.20V (Default 4.10V) / LiFe 3.58V-3.70V (Default 3.60V) PC CONNECTIVITY & UPGRADABLE FIRMWARE: Control your charger and update it with new firmware via the built in USB port. The software (PC Only) can be downloaded from SKYRC's website for free. Attention: only buy from addpoweradd can get the guarantee.