Spartan 821/721 Manual Instrument Hardware Specifications A-15
A.1.10 Wireless Charger Specifications
A.1.11 External DC Power Supply Specifications
A.1.12 Battery Power Specifications
Charger Type Qi™ WPC-compatible receiver
Required Power 5 W Minimum
Voltage +6 V to +24 V
Required Power
10 W minimum for fast charge;
2.5 W minimum for unit without charging with screen on
1.0 W minimum for unit without charging and screen off
Typical power draw from *12V supply:
• Base power with screen off: 720mW
• Screen on 100% brightness add 1500 mW
• Screen on 50% brightness add 1200 mW
• 1/1 or 1/3 OBA add 60 mW
• 100ms Time History add 165 mW
*Total power draw is estimated by summing the base power with the
additional powers from the named states.
These values are estimated with a 12V input supply. Differing supply voltages
can cause further change.
Battery Type Internal Lithium-Ion batteries
Typical Operating Time
Display Off
40 hours (Typical power draw 0.5W)
30 hours with 100ms Time history (Typical power draw 0.65W)
Display On 50% brightness
15 hours (Typical power draw 1.6W)
12 hours with 100ms Time history (Typical power draw 2W)
Charge Time
(at room temp)
Fast charge: 2.75 hours to 50%
USB or External Power: up to 8 hours
Qi Wireless Charger: up to 14 hours
Charge Priority
(highest to lowest)
1: USB
2: Qi Wireless Charger
3: External DC Power
Self Discharge
Batteries will self discharge 10-15% per month when the unit is powered off.
Charge unit before use after long periods of storage.
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