User's Manual

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When using secondary batteries they can be charged by connecting the USB charger to
the port on the base of the handheld. The power source can be supplied from any
PC/laptop or any mains to USB charger plug of suitable quality that provides a 5VDC
output and 500mA current. WARNING: Cheap charging devices often fail to meet the
requirements of the Electrical Equipment Regulations Act 1994, as a minimum any
charger plug must have a CE mark, shown below. It is the responsibility of the operator
to ensure any charger plug is safe to use.
The time taken to fully charge the TW-3.0 will depend on the batteries in use and the
type of charger, a simple calculation is:
Charge Time (hours) = Battery capacity (mAh) ÷ charging current (mA)
For example:
3x Ni-MH AA batteries with 2000mAh capacity charging from a laptop at 500mA:
6000 ÷ 500 = 12 hours
The charger will automatically detect the battery type, chemistry and capacity, this can
take up to 2 minutes from when the charger is connected but it will ensure that all
battery types are fully charged and that primary cells will not be charged and therefore
will not become damaged by connecting the USB.
See section 3.0, for battery charging display indicators.
WARNING! DO NOT CHARGE BELOW 0°C
WARNING! DO NOT CHARGE NON-RECHARGABLE BATTERIES