A ’smart phone’ Lithium Ion (Li-ion) battery?

October 18, 2009 by admin · 1 Comment
Filed under: Other - Electronics 
smart phone
PCworld asked:


A ‘smart phone’ Lithium Ion (Li-ion) battery has a capacity of 1200 mAh.The battery can be used for 4.5 hours ‘talktime’, or for 10 days on standby.
Approximately how much current does the ‘smart phone’ draw (1) during ‘talktime’ (rounded to the nearest whole number) and (2) when on standby?
Choose two options, one from rows A-D and one from rows E-H,
(1) Current drawn during ‘talktime’
A: 156 mA
B: 267 mA
C: 375 mA
D: 654 mA
(2) Current drawn when on standby
E: 0.75 mA
F: 5 mA
G: 7 mA
H: 25 mA