Nickel-Metal-Hydride (Nimh) Batteries - ROBBE POWER PEAK ULTIMATE 2 Manual De Uso

TEMPERATURE
During a high-current discharge process an NC battery heats up very strongly. Before the
pack is recharged it must therefore be allowed to cool down again. A warm cell, far less
a hot cell, can absorb less charge, and is therefore unable to produce its full performance.
FINAL DISCHARGE VOLTAGE, DEEP-DISCHARGING
The permissible final discharge voltage of NC batteries, measured under load, is around
0.85 Volts per cell. If the battery is discharged below this figure, it is said to be deep-
discharged. This can result in individual cells in a pack reversing their polarity, i.e. nega-
tive potential is present at the positive terminal, and positive potential at the negative ter-
minal; this can be checked with a Voltmeter under a low load. Permanent cell damage can
usually be avoided in such cases by immediately giving the pack a 14-hour slow charge.
NC batteries are not as susceptible to damage from deep-discharging as NiMH cells.
However, if a pack is stored for a long time in the deep-discharged state, permanent cell
damage can still occur.
When handling NC cells certain safety measures are absolutely necessary to avoid the
risk of personal injury and property damage. When you use these batteries, you are
personally responsible for any problems which arise.
• NC cells must never come into contact with open fire, as they may explode.
• Never forcibly open NC cells; they contain corrosive materials.
• Never short-circuit NC cells - fire hazard, possible explosion hazard.
• If electrolyte should escape from the cell, do not allow it to touch your skin or eyes. If
this should happen despite taking normal precautions, immediately wash it off using
plenty of clean water, and seek medical attention immediately. Never place NC cells
or batteries in your mouth, as they contain toxic materials.
• Never solder directly to the cell case; the negative end of the cell is particularly vul-
nerable to damage.
• A charged NC battery is not a child's plaything. Store these batteries well out of the
reach of children.
• Please read and observe the safety notes and other information provided by the bat-
tery manufacturer before charging and discharging the cells.
13.2

NICKEL-METAL-HYDRIDE (NIMH) BATTERIES

In the last few years modern nickel-metal-hydride (NiMH) batteries have developed into a
genuine alternative to NC types. They are now capable of being discharged at high cur-
rents like NC cells, and are a good choice as power sources for radio control equipment
as well as flight / drive batteries. They generally offer around 1.5 times the capacity of NC
batteries for the same weight, and they are also more environmentally friendly.
Operating instructions
POWER PEAK ULTIMATE 2
24
No.
8470