Replacement battery 0090041000 series battery for Trilithic 860DSP & 860DSPi field analyzer. This 7.2V battery is assembled at our facility in PA and is not an OEM original battery. Our 0090041000 batteries are compatible replacements for the costly Trilithic battery. Are you interested in purchasing large quantity of this item? If so please contact us to discuss your volume to see if you qualify for special pricing.