BATTERIES4EVERYTHING.com, (CEI) buys the best available quality for each of its product lines. The concept and standard set for the CEI line of products was and is a strict adherence to meeting and exceeding the manufacturers specifications or performance level for each category of products. All batteries must test out at maximum current draw for Mah. rating when compared to factory products. All power products are tested and certified in the USA to their published performance level. CEI provides OEM quality at after-market prices.