Celestron PowerTank Lithium 7A battery

The Celestron PowerTank Lithium battery is perfect for the amateur astronomer on the go. With a total capacity of 7A, the Lithium Phosphate (LiFePO4) battery chemistry has significant advantages over other battery chemistries: it has an un-recharged shelf life of 10 years compared to 3 years for the classic Lithium Ion and 6-9 months for a Sealed Lead-Acid battery. The Celestron PowerTank Lithium battery performance degrades at a much slower pace than other batteries: it can be charged and discharged 2000 times compared to only 500 for a classic Lithium Ion battery and 300 for sealed lead-acid designs. The batteries will last as long as the telescope you use it with!