 " Battery Pack "@en, VW-VBT190 "@en "Panasonic - Pack"@en
"
Features

3.6V, 1940mAh(min.), 7.0Wh
Uses Battery Charger VW-BC10

"@en 
 "Panasonic VW-VBT190 Lithium-Ion Battery Pack (Black)"@en-US "Accessories - Page 989 | EISF"@en-US
"This is an authorized aftermarket product. Fits with various Panasonic brand models. It has a oem part # VW-VBT190."@en-US 