Battery_Categories.
2 Way Radio
AA cells
AAA cells
C cells
D cells
9 volt cells
Alarm System
APC UPS
Baby Monitor
BarCode Scanner
Calculator
Camcorder
Cell Phone
CMOS
CNC Machine
Coin Cell
Computer Backup
Cordless Headset
Cordless Keyboard
Cordless Mouse
Cordless Phone
CR123
Digital Camera
Dog Collar
Door Lock
DVD
E-Book Reader
Evoke
Flashlight
Game & Toy
General Purpose
Generic Batteries
GPS
Hands Free Kit
Headphone
Headset
Hearing Aid
Industrial
Infrared Camera
iPad
iPhone
iPod
iRobot
Keyboard
Laptop
LCD Flat Screen
Miscellaneous
Motorola Pager
Mouse
MP3, MP4, PMP
Music Players
Nortel Companion
Notebook
Okuma Lathe
Paintball Gun
PDA
PDT
PLC Batteries
POS Terminal
Power Tool
Printer
Projector
Pro Video
Raid Controller
Remote Control
RV Camera
Satellite Radio
Scanner (Radio)
Scanner (Barcode)
Scooter
Security & Alarm
Sub C
Survey Instrument
Test Equipment
Thermal Imaging
TV Remote Control
Universal Lithium
UPS Battery model
UPS model
Vacuum
Wacom Tablet
Watch
WheelChair
Wireless Headset
Wireless Intercom
Wireless Mic
Wireless WiFi
Wireless Router

Sennheiser equivalent BW900, BW900BAT, 500759 Headset Battery

There is a $7 Cdn ($7.00US) shipping and handling charge.
90 day warranty and no questions asked 1 month return policy.