Technical data

Instruction Manual

E03766 Issue 3.0

2.6 Charger options

The HT50 is supplied with a TC50 trickle charger that will

accept the whole radio or the battery only. The TC50 runs from

a 12.6V–15.5V DC supply or from AC mains with an appropri-

ate optional adaptor/power supply. Charging with the trickle

charger takes approximately 12–16 hours. There is also a rapid

charger available (RC50) which will charge the battery within

hours.

2.7 Charging of batteries

To charge the NiCad and NiMH battery packs, insert the battery

or radio into the charger ensuring that any moisture is wiped

from the contacts on the back of the battery pack. The TC50

will trickle charge the battery to full capacity (Fig 2.5). The

RC50 will rapid charge the battery until it is fully charged and

then automatically switch to maintenance charge.

• Note that batteries are supplied uncharged and must be

fully charged before use.

• Fully charge the battery when not in use, though it may

lose some of its charge after several months of storage.

• Do not charge at temperatures below 0°C or above 40°C.

• Turn off radio when charging the battery.

• Regularly discharge the battery totally – repeated recharg-

ing of the battery while it is only partly discharged may cre-

ate a ‘memory effect’, preventing it reaching full charge.

• Dispose of used batteries carefully. The contents of the bat-

teries could be harmful to the environment.

• Never expose to a naked flame.

Caution The LTB3 lithium battery is not rechargeable and under no

circumstances should any attempt be made to recharge it.

Replacement batteries can be ordered from your local

Simrad Agent.

2.8 Battery level indicator

Except when adjusting the volume or squelch level, the bar

graph on the display shows the battery charge level (Fig 2.6).

This indicates the voltage at the battery terminals, not necessar-

ily the charge stored. Ten or nine bars indicate a fully charged

battery, three or four bars mean the battery is almost drained.

A more accurate indication of the battery state will be obtained

by transmitting briefly on high power. Do not use Ch 16 for

this purpose.

Fig 2.5 - Battery charger

Fig 2.6 - Battery level indicator