Installation Instructions

ADI Confidential
Rev. Sp0 | Page 17 of 20
BATTERY LIFE AND MEMORY FOOTPRINT
BATTERY LIFE
The battery life is determined by the type and number of
sensors enabled, the sampling rate configured and is also
dependent on other configuration details such as the LED
current in the photoplethysmography measurements.
Table 10. System Battery Life for Several Use Cases
Use Case
Memory
Live
BLE
Battery
Life
(Hours)
Shipment
Mode
No
No
30000+
Hibernate
No
No
1000+
PPG – High
Performance
Yes
Yes
14
ECG – High
Performance
Yes
Yes
40
PPG +
Impedance
Yes
Yes
50
PPG + ECG
Yes
Yes
40
PPG – All LEDs
Yes
Yes
20
The VSM watch is powered by a rechargeable 200 mAh
battery.
MEMORY FOOTPRINT
The watch hosts a 512 MB memory.
The actual capacity of the memory is determined by the type
and number of sensors enabled and the sampling rate
configured.
Table 11. Memory Capacity (in Hours) for Different Use
Cases
Vital Signs
Memory Capacity
(Hours)
PPG – High Performance
18
ECG – High Performance
22
PPG + Impedance
63
PPG + ECG
43
PPG – All LEDs
23
Note : All the default usecases are designed to maximize
the performance. By modifing various parameters of the
AFEs one can achieve longer battery life and memory usage.
For instance in ADPD4100 the default gain in AGC algorithm
is set to 25K so as to get best PPG performance with various
skin tones. Setting the gain to 100k/200k and lowering
current value will result in significant improvement in
battery life.