CS540 Battery, Premium Quality Replacement Rechargeable 140mAh 3.7V Battery for Plantronics CS540, CS540A CS540-XD and C054 Wireless Headsets 86180-01 PL-86180-01 & 84479-01 (Blue 4 Pack) Our replacement AvimaBasics battery is the PERFECT FIT for your Plantronics CS540, CS540A and CS540-XD wireless headset at home or the office! And will help you get your job done when you need it. Don't miss your next important call! Other replacement batteries aren't made of LONG LASTING and don't match up to our specifications of 140mAh 3.7V PERFECT FIT for your Plantronics CS540, CS540A and CS540-XD Wireless Headsets 86180-01 PL-86180-01 & 84479-01 Avoid trying to constantly recharge your battery or if it's time to get a new battery don't hesitate to click 'ADD TO CART' today! Also, remember to get one for your friend and co-worker and rest assured of products are back with a 1 YEAR UNCONDITIONAL Replacement Warranty!