There is this Bluetooth Audio Reciever/Amplifier board that I'm looking to get from ebay, and according to the diagram, there's a MicroUSB 3.7V lithium battery charger component in it.
With my understanding that wiring multiple batteries don't increase voltge but rather current/capacity, will I be able to wire in multiple 3.7V 18650 batteries in parallel (maybe 4) in order to increase my runtime, at the cost of having longer charging times?
Is this a universal case or a chip specific situation? I've asked all of the sellers who sell that product, and none of them knows the answer.
Link to eBay item: http://www.ebay.ca/itm/181744265268