Extended battery life for Plantronics Savi and CS over-the-head models now shipping: New battery provides up to 13 hours of talk time (up from 9) for most models. The new battery is backward compatible to units in the field, and the spare battery is available now for purchase (part # 202599-03). Savi/CS models with the date code of L4 or later are guaranteed to have the new battery. Description: Spare headset battery with removal toolPart Number: 202599-03Price: $39.95Date Code: L4 and later A=January 4=2014 B=February 5=2015 C=March D=April E=May F=June G=July H=August I=September J=October K=November L=December Model # NEW Talk Time(Narrowband) NEW Talk Time (Wideband) NEW Standby (Narrowband) NEW Standby (Wideband) Savi 410 Up to 13 H (Previously 9 H) Up to 8.5H Up to 4 days Up to 4 days Savi 420 Up to 13 H (Previously 9 H) Up to 8.5H Up to 4 days Up to 3.5 days Savi 710 Up to 13 H (Previously 9 H) Up to 8.5H Up to 4 days Up to 4 days Savi 720 Up to 13 H (Previously 9 H) Up to 8.5H Up to 4 days Up to 3.5 days CS510 Up to 13 H ((Previously 9 H) Up to 8.5H Up to 4 days Up to 4 days CS520 Up to 13 H (Previously 9 H) Up to 8.5H Up to 4 days Up to 3.5 days CS510-XD Up to 12 H (Previously 8.5 H) Up to 8 H Up to 2.5 days Up to 2.5 days CS520-XD Up to 12 H (Previously 8.5 H) Up to 8 H Up to 2.5 days Up to 2.5 days Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website