I have a hard time understanding all this patter about batteries. I'm not only a professional photographer, but a retired electronics engineer. As these batteries work, it is electrons that flow from the negative pole on the battery, through the circuits in the camera to the positive pole of the battery. The force of the electrons is measured by volts, and the amount of electrons is measured by AMPs. That is what you read on the battery tag. On a Canon LP-E6n the output voltage is 7.2 volts, and 1865 mili amps per hour. The Canon LP-E6 battery puts out the same voltage, 7.2v, but a little amperage at 1800 mili amps. A B&M battery for Canon, BM LPE6 has a little higher output voltage of 7.4 volts but puts out a whopping 2600 mili amp/hr. Even though the amps/hr is greater than both Canon batteries, the camera will only use the amps or electrons to run the circuits in the camera, so no harm will be done. The difference in voltage will not be significant to cause a problem within the camera. As far as charging, the charger output would have to be in line with the voltage, and amperage of the installed battery, or if to high voltage, or amperage will cause a fire with Li batteries. All Li batteries should contain a chip that will limit the rate of charge, and amount of charge. I've not seen a Canon camera that detects the "off brand" batteries. So, the physics of Li batteries are the same, no matter which brand you install in your camera. The higher the mili amp value, the longer the charge will last. Keep in mind the runs on the circuit cards inside your camera can be compared to a hair, and a very thin one at that. Those of you who pay $29.00 for two wabasi batteries and get a car charger, you got a deal, those who pay $59.00 for real Canon battery, thanks for the donation.