Sennheiser A200 HDI IS RA RI RS Set BA150 BA151 batteries.
Sennheiser A200, HDI, IS, RA, RI, RS, Set, BA150, BA151, WEST-BA151, Headphone batteries.

Charge your new battery when it arrives and first used. If they are not being used then also recharge every eight weeks and ensure they are charged before putting away.

Replaces 3.7V batteries :
BA150, BA151, WEST-BA151

Fits the following headphones:
Sennheiser
A200
Audioport A200 Set
HDI 302
HDI 380
HDI302
HDI490
IS 150
IS 300
IS 380
R150
RA-85
RI 150
RI 250
RI 250 J
RI 300
RI250
RI250-J
RI250S
RS 2400
RS 30
RS 4
RS 40
RS 400
RS 45
RS 6
RS 60
RS 65
RS 8
RS 80
RS 85
RS-2400
RS-30
RS-4
RS-40
RS-400
RS-45
RS-6
RS-60
RS-65
RS-8
RS-80
RS-85
SET 20
Set 250
Set 2500
Set 250S
Set 500
Set 50TV
Set 810
Set 810S
Set 820
Set 820s
SET-20
SET-250
SET-2500
SET-250J
SET-810
SET-810S
SET-820S
SET90

Battery type : Ni-Mh
Voltage: 2.4V
Capacity: 60mAh
Colour: