AA Portable Power Corp. (dba: Batteryspace.com) was founded by several previous BYD USA team members in 2000 and became a joint venture of several battery and charger manufacturers over years. We are specialized in all kinds of rechargeable batteries and chargers, include Nimh batteries, Nicd batteries, Lead Acid batteries, Li-ion batteries, Polymer batteries, LiMnO batteries, LiFePO4 batteries, PCB/PCM/BMS and related battery chargers. We have a 15000 SqFt warehouse and two battery assembling production lines in Richmond California. We also have warehouses and production lines in Shenzhen, China. Our customers are from all over the world, for example, USA, Canada, Europe, Australia, New Zealand, India etc. At BatterySpace.com, we are not only sale the batteries and chargers, but also provide the service to help customer design their own custom batteries. We also store inventory for customers who place a schedule order. Our sales and engineers have more than 10 years of experience, if you have any new design or inquiry, please just give us a call at 1-510-525-2328, our engineers will work with you and provide you the best solutions.