There are 3 equivalent Sony NP-FM30 NP-FM50 NP-FM70 NP-FM90 NP-FM91 batteries & 3 chargers for you to choose from

Outline

Model

Type

 RunTime

Capacity

Price
Sony NP-FM30 NP-FM50 Camcorder Battery BLI180C
(NP-FM30
NP-FM50)  		Li-ion Up to 3 hrs 1300mAh
7.2v		 $43.86 Cdn
($37 US)
BLI180-2.5C
(NP-FM70
NP-QM71)		 Li-ion Up to 6 hrs 3000mAh
7.2v		 $62.82 Cdn
($56.86 US)
 BLI180-4C
(NP-FM90/91
NP-QM91)		 Li-ion Up to 9 hrs 4500mAh
7.2v		 $72 Cdn
($64.02 US)

Battery Chargers

Outline Model Description Price
Samsung SC-D351,SC-D352,SC-D353,SC-D354,SC-D355,SC-D557,SB-LS80,SC-D6550,SB-LSM80 Camcorder Battery Charger VBC-180P

Works in the car or at home - AC and 12V DC power adapters included.
120 volt
 (Specify in comments if 100/220 volt is required+$15Cdn)

 $41.17Cdn
($36.80US)
NP-FM30 NP-FM50 NP-FM70 NP-FM90 NP-FM91 battery charger Lenmar MSC1LX
 Fast 30 minute Li-ion battery charger.

Charges most Canon, Panasonic, JVC, RCA, Hitachi  7.2/7.4v Li-ion batteries. Includes DC car cord and AC adapter. Works overseas without power adapter.

 $73.51 Cdn
($65.99 US)