Help CenterThe door/window contact sensors for the Gen 2 Wi-Fi alarm system use two CR2450 3 V lithium coin batteries, which normally last 3 to 5 years under typical conditions.
1. Is the Gen 2 installed in a home or business?
2. Which sensors are showing the low-battery notification (all or just some)?
3. How often are the affected doors or windows opened and closed each day?
4. Are the sensors installed near any hot or cold environments or on a metal surface?
5. Approximately how far are the sensors from the main alarm panel?
If you’re receiving low-battery notifications after just a few months, that’s unusual, but it can occasionally happen for a few reasons:
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Battery age or storage:
Even new sensors may include batteries that were stored for an extended time before installation, which can reduce their lifespan. -
Frequent triggers:
If the sensor is installed on a door or window that’s opened and closed very frequently, the battery will drain faster. -
Temperature extremes:
Cold or hot environments (especially below 0 °C or above 40 °C) can shorten lithium battery life. -
Signal strength:
If the sensor is at the far edge of the panel’s range or experiences interference, it may transmit more often to maintain connection, consuming more power.
Troubleshooting steps:
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Replace the batteries in one of the sensors showing “low battery” with a new, brand-name CR2450 3 V lithium coin cell (e.g., Energizer or Panasonic).
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After replacement, re-check the app notification to see if the warning clears within a few minutes.
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Observe whether other sensors show similar warnings.
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If only one or two sensors are affected, it’s likely due to the original batteries.
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If several sensors report low batteries around the same time, it could indicate an environmental factor (temperature, range, or interference).
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If the issue continues after replacing the batteries, please let us know the approximate distance of those sensors from the main panel and whether they’re installed near metal surfaces or exterior doors. We’ll help you check for any signal-related factors that might cause extra battery drain.
Why metal surfaces matter:
When an RF (radio frequency) sensor like your contact sensor is installed on or very close to metal, the metal can:
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Interfere with the RF signal between the sensor and the main panel.
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Metal reflects and absorbs radio waves, which can weaken or block the signal.
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The sensor may need to retransmit multiple times to reach the panel, using more battery power.
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Affect the magnetic field between the contact and the magnet.
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If the magnet or sensor is mounted on a metal door or frame, it can slightly distort the field, causing the sensor to work harder or trigger incorrectly.
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Change temperature behavior.
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Metal conducts heat and cold quickly, so if the sensor is mounted on a metal surface (especially an exterior door), it can be exposed to more rapid temperature swings, which also impacts battery efficiency.
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