On Order Marshall Wireless Headset Battery Li-Polymer Battery fits Marshall, Major Ii, Major Ii Bluetooth 3.7V, 650mAh CS-MRS300SL $27.03 Quality components are important for the efficient and smooth operation of your battery. We always use the best parts. We try to keep our data as current as possible, but there may be occasions when new models have not been updated to the website yet. If in doubt contact us and we will confirm fitment. Add to cart