Item Brochure

7
used operate an instrument until it automatically
switches off.
Batteries in regular use
After use, a battery in regular use can be placed in
the charger until fully charged (the green light
flashes). The charging time depends on the battery
capacity and temperature. An indication of typical
charging times is shown on page 4.
Charging temperature
The charging temperature (ambient temperature) has
a significant impact on the life of the batteries.
Charging at high temperature can cause loss of
capacity. These losses in capacity are irreversible.
Even with several charging and discharging cycles, the
original capacity can no longer be obtained.
For optimal charging, we recommend that the
batteries are charged at ambient temperatures that
are as cool as possible ( +10 °C to +20 °C / +50 °F to
+68 °F). The permitted temperature range in which
charging can still be performed is between 0 °C and
+35 °C (+32 °F and +95 °F). A temperature-control
mode built into the GKL221, GKL211 and GKL112
prevents batteries from being charged at
temperatures that may damage them.
Useful capacity
The temperature has a particularly significant effect
on the useful capacity of a battery. The batteries can
be operated from –20 °C to +55 °C (–4 °F to +131
°F) in accordance with the operating range of the
surveying instrument. The useful capacity drops
rapidly with reducing temperature. Continuous use in
the upper temperature range (> +45 °C / +131 °F)
shortens the life of the battery.
Storage
Leica Geosystems batteries can be stored at –40 °C
to +55 °C (–40 °F to +131 °F). Do not store batteries
inside the surveying instrument. After a long period in
storage, batteries should be fully recharged before
use.
Li-Ion
Li-Ion batteries start to deteriorate from the date of
manufacture. To minimise the aging effect, store the
battery in a cool place in a 10%–50% state of charge.
Li-Ion batteries do not require regular charging while
in storage.
NiMH
NiMH batteries must always be stored fully charged
and recharged after 180 days at the latest. High
temperatures and high atmospheric humidity
accelerate the self-discharging effect. We recommend
storage in the range 0 °C to +20 °C (+32 °F to +68
°F) in a dry environment. Irreversible damage can be
caused to NiMH batteries if they are stored in the
discharged state for an extended period.
Shipment
To prevent hazardous conditions or physical damage
(fire, chemical or toxic hazards), batteries must be
shipped in the discharged state.
The regulations relating to the shipment of batteries
must be observed.
Memory effect
The "memory effect" occurs if the same charging and
discharging (partial discharge) conditions are
continuously applied to a battery. The battery then
no longer provides its full capacity. The operating
time per battery charge reduces. If the capacity of
the battery drops noticeably, it should be "refreshed"
2 or 3 times (see above).
The memory effect occurs with NiMH and NiCd
batteries. Li-Ion batteries are not influenced by the
memory effect.
Battery refresh function
If the capacity of a NiCd or NiMH battery drops
noticeably, the battery can be refreshed using one to
three full charge and discharge cycles. The GKL221
charging station has a discharging and charging
function for refreshing batteries.
The GKL112 and GKL211 chargers do not have a
discharge function. Therefore the batteries must be
discharged in the instrument (i.e. operate until the
instrument switches off).