Lathem Sonachron Battery – Replacement Backup Battery for DWA-S Timer
The Lathem Sonachron battery is a direct replacement backup battery for the Lathem DWA-S Sonachron program timer. This battery keeps the clock running and preserves programmed schedules during power outages, helping prevent lost settings and unnecessary reprogramming. Replacing the battery is often the fastest way to restore normal operation when a Sonachron display becomes dim or loses time.
The Sonachron system uses an internal rechargeable battery to maintain time and stored data when AC power is lost. Once power returns, the battery automatically recharges. When the battery weakens, the unit may lose programming or require resetting after outages, making replacement an important preventive maintenance step. :contentReference[oaicite:4]{index=4}
Sonachron Compatibility
- Lathem DWA-S Sonachron Program Timer
- Lathem Sonachron Shop Timer Applications
Legacy Equipment Support
Many businesses continue operating Sonachron timers because of their durability and simple scheduling operation. Using the correct replacement battery helps extend equipment life and avoids downtime caused by lost programming. Keeping a spare battery on hand is recommended for facilities that rely on scheduled signals or equipment control.
Common Battery Failure Symptoms
If your timer loses settings after a power interruption, the backup battery is usually the cause.
Backup batteries in time clocks and program timers gradually lose capacity over time. When the battery can no longer hold a charge, the equipment may continue to operate while plugged in but fail to retain time or programming during power interruptions. Recognizing these symptoms early helps prevent unexpected resets and lost schedules.
- Clock or timer loses time after power outages
- Stored schedules or programmed events disappear
- Display becomes dim or difficult to read
- Unit resets to default settings
- Programming must be re-entered after unplugging
In many cases, replacing the internal backup battery restores normal operation and extends the life of otherwise reliable equipment. Preventive battery replacement every few years helps avoid downtime and unnecessary service calls.
FAQ
What happens if the battery fails?
The timer may lose time or stored schedules when power is interrupted.
Is this a common replacement item?
Yes. Battery replacement is one of the most common maintenance steps for Sonachron timers.
How often should it be replaced?
Most users replace the battery every 4–5 years to maintain reliable backup operation.
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