Do not confuse with the LR65 which is virtually the same size, is the same voltage but is not rechargeable.
Do not confuse with the ML616 which is the same size, but is 3 volts and rechargeable.
These rechargeable batteries were developed for solar powered watches. Some have wire "flags" spot welded to them for the connection (see image at bottom) others are as a standard button battery.
Developed to replace the capacitor in some Seiko Kinetic watches.
The battery is the same for all versions, differing numbers relate to "flag" type.
295-41, 295-66, 3023-4MZ, 3027-3MZ, 3027-4MZ, 3027-29N, 3027-29R, MT616, MT616A,
not to scale.
Diameter × Thickness.
|Chemical Composition.||Nominal Voltage.|
|MT616.||6.8 mm × 1.6 mm|
|Manganese Titanium Lithium Rechargeable.||1.5 volts|