Replacement rechargeable NiMH battery pack for the PI-4100 field strength meter.Potomac EPG-1068 NiMH Battery Pack for PI-4100SKU: EPG-1068$0.00PriceExcluding Sales Tax | Shipping PolicyQuantity*Add to CartBrandPotomac InstrumentsProduct DetailsManufacturer: Potomac InstrumentsManufacturer part number: EPG-1068Sold by: Radio Gearheads, 705 Eaton Ave N, Fosston, MN 56542 Questions about compatibility, configuration or lead time? Call 1-800-992-1506 or use Get A Quote.