Minelab GPX5000 Instruction Manual download pdf (Page 11)

18 19Charging the Battery

The aluminium battery case contains the 7.4V Lithium-

ion (Li-ion) battery pack and an internal charging circuit.

Supplied with the GPX 5000 and GPX 4800 is a mains

charger adaptor and a 12V vehicle charger adaptor.

When fully charged, the battery will provide enough power

to operate the detector for approximately 12 hours.

The charger will recharge a flat battery in approximately 5

hours, but partially discharged batteries require a shorter

recharge time. There is no need to fully discharge the Li-ion

battery before recharging, it can be recharged at any time

you are not detecting.

Note: Some after market coils can drain the battery at

a higher rate which may reduce your operating time by

up to 30%.

Vehicle Charger Adaptor

The vehicle charger adaptor will charge

the battery from the accessories socket

(cigarette lighter) of most motor vehicles.

The socket must be 12–24VDC.

Tip: A spare battery is

available as an accessory.

If travelling into remote

areas a spare battery will

ensure you can continue

detecting for long

periods of time.

To prevent damage to the battery, do not start the

vehicle's engine while the battery is connected.

Make sure your vehicle's battery is in good condition

before using it to charge the GPX Series battery.

Caution: The new battery should initially be

charged for 8 hours before use.

Mains Charger Adaptor

The mains charger adaptor will charge the battery from local

mains (AC) power outlets.

To Charge with the Mains Charger Adaptor:

1 Disconnect the power cable from the battery.

2 Connect the mains charger adaptor to the battery power

plug and the wall socket.

3 Switch the wall socket on.

The colour scheme of the tri-colour LED (p. 20) will indicate

the status of the charging process.

Lithium-ion cells are known to lose capacity

with time. This is due to the effect of two

factors:

Capacity Fade on Cycling

Degradation of capacity is particularly evident

if the battery is repeatedly charged and

discharged (as in normal use). This is a generic

phenomenon, known as capacity fade, and is

a characteristic of the electrochemistry of the

Li-ion system regardless of manufacturer or of

specific active materials.

Other very important contributors to capacity

fade are deep or over-discharge, and leaving a

battery fully discharged for long periods of time

before recharging. These conditions should be

avoided wherever possible to minimise capacity

fade and obtain optimum cycle life. Minelab

detectors shut down at a certain minimum

voltage of the battery in order to prevent

the battery being deep discharged. Also, the

battery pack itself has an electronic protection

circuit on board to prevent this from happening

in case of a short circuit when the battery is not

connected to the detector. Recharging your

battery shortly after draining it to nearly empty,

and not leaving it empty, will reduce this effect.

Shelf life

An older Li-ion battery will not last as long as a

new battery due solely to its age. This is due to

an increase in internal resistance, which affects

its ability to deliver current.

To Charge with the Vehicle

Charger Adaptor:

1 Disconnect the power cable from the

battery.

2 Connect the vehicle charger adaptor to

the battery and to the vehicle accessories

socket.

The colour scheme of the tri-colour LED (p.

20) on the battery will indicate the status of

the charging process.

Note: Don’t leave the battery on charge

in a closed vehicle on a hot day as it is

temperature protected and will stop

charging.

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Minelab GPX5000 Instruction Manual Page 11

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