Circuit design

Should be SMPS
based for operation
on wide range of
mains voltage

SMPS based
wide range
with defined
limit

Safe working of
CFLs and long
product life

Narrow range or
unlimited wide range

Can damage
components and
CFLs

Mains Low
Voltage Cut-off

Should switch
over to
back up mode
if mains voltage goes
below 90 Volts

Switches to back up
mode at 90 Volts

No danger of damage to
CFLs/mobile chargers
and will always provide
back up light in
low voltage areas

No switch over to
back up mode even
if voltage is lesser
than 90 Volts

CFL will not glow
and there will be no
back up light in low
voltage areas

Mains High
Voltage Cut-off

Should cut off mains
supply if voltage is
above 320 Volts

Cuts mains supply
above 320 Volts

No danger of damage
to CFLs/mobile chargers
connected

In some products
Mains is not cut off
even if mains voltage
is above 320 Volts

CFLs and mobile
chargers connected
will be damaged

Battery charging
current

Should be around
0.7 Amp to 0 .8 Amp

0.8 Amp

Longer battery life

It varies from
0.5 Amp to 1.0 Amp
in different models

If it is less than
0.7 Amp battery
will not charge properly
and if it is more than
0.8 Amp then battery
will be damaged

Battery voltage
lower cut off limit
during back up

System should turn off
if battery voltage
drops below 10.2 volts

10.2 Volts

Battery is no deep
discharged and
prevented from damage

7 Volts

Battery will be
deep discharged and
will be damaged

Battery voltage
higher cut off limit
during charging

Should be 14.4 V

14.4 Volts

Battery is not over
charged and prevented
from bulging/bursting

Over 14.4 Volts

Battery will be
damaged due to
overchage