Last items in stock Extech Survey Battery Li-ion Battery fits Extech, Vir 50, Vir50, 3.7V, 1600mAh CS-EXR500SL $31.97 The products that Cameron Sino manufacture will provide you with a reliable product offering the ultimate in service life. The batteries are built to last yet surprisingly affordable. Not sure which battery you need to order?, contact us before placing your order. Usually to be certain we will need the original battery model number . Please be prepared... Add to cart