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Operating Environment| operational temperature range | -10 °C to 60 °C / 14 °F to 140 °F |
|---|---|
| loss/gain (monthly rate) | ±15 seconds at normal temperature range (5 °C to 35 °C / 41 °F to 95 °F) |
| frequency of crystal oscillator | 32, 768 Hz |
Power| power supply | Manganese titanium-lithium rechargeable battery |
|---|---|
| continuous operating time from full charge | Approximately 6 months if the stopwatch is used for shorter than 1 hour per day |
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