Coin-type lithium batteries (Sanyo; Panasonic) are available in two types:
Poly-carbonmonofluoride lithium (BR series): For uses that require extended reliability and safety.
The BR series batteries are for applications exposed to extended temperature ranges and harsh operating conditions - operational temperature range: -40°C (-40°F) ~ 125°C (257°F). This series has excellent leakage resistance and is commonly found in automotive electric systems; tollway transponders and RFID units.
Manganese dioxide lithium (CR series): For uses that require high voltage and strong load pulse characteristics. The CR series batteries have a temperature range of -30ºC ~ +60ºC.
This series is used for high voltage requirements and strong load pulse characteristics. These are commonly found in memory back-up applications (with tab terminals), cameras, watches and calculators.
The specific battery that Kenwood uses (W09-0326-05) is a Sanyo CR2032 battery with solder tabs - Panasonic CR2032/1F2 is equivalent to the Sanyo.
The 1F2 suffix is the ID designation for the 7 mm solder tabs horizontal to the battery and with insulation wrap (yellow).
This battery is rated at 220 mAh and easily fits the 35mm spacing between the PC board connections.
Digi-Key sells the BR version.
Bill Leahy, K0ZL (sk) battery replacement instructions list DigiKey part number P025-ND as an alternative battery. This battery is shown in the photos of his replacement instructions.
This battery is actually Panasonic BR2330A/FA.
The FA suffix is the ID designation for a 7 mm and 5 mm solder tab horizontal to the battery with insulation wrap (lime green).
This battery is rated at 255mAh and fits 35 mm spacing between the PC board connections.
Last edited by W9GB; 05-06-2012 at 09:49 PM.