BATTERY
INFORMATION
RECHARGEABLE
BATTERIES
Currently Firefly Magic® Firefly Lights continue
to use Nickel Cadmium (Ni-Cd) batteries in the Solar
Powered models rather than the newer Nickel Metal Hydride
(NiMH) rechargeable batteries.
We receive questions about this as NI-Cd
batteries are becoming more difficult to source, and
they are marked
as toxic, due to a small amount of Cadmium sealed inside.
Because of this, Ni-Cd batteries should be recycled,
or disposed of at special waste centers that accept products
like
fluorescent light tubes, old TV picture tubes, and computers.
So why are we still using them? Simply put, Ni-Cd batteries
are far more reliable than NiMH batteries in the harsh
outdoor
environments
where
Firefly Magic® Firefly Lights are typically installed.
Whether its in an Arizona desert landscape where battery
temperatures can reach 140°F in the summer, or below
0°F in the Canadian winter, Ni-Cd batteries have
proven to work consistently and last for up to
two years.
On the other hand, NiMH batteries have developed a very
bad reputation for reliability in outdoor lighting products.
NiMH rechargeable batteries sometimes last
only a few weeks in extreme hot and cold seasons.
We're always concerned about our customers and the
environment and we know that if recycled correctly,
Ni-Cd batteries do not pose a threat
to either.
To further explain the differences between the two battery
types, please review the chart below:
| |
Nickel Cadmium
(Ni-Cd)
(Used in Firefly Magic® products)
|
Nickel
Metal Hydride
(NiMH)
|
PROS |
- Reliable and Stable
- Resists abuse
- Can have
high discharge rates
- Can be used over wide temperature
range of -20C to +60C reliably
|
- Higher energy density
than Ni-Cd |
CONS |
- Cadmium is toxic requiring
recycling |
- Poor low temperature performance
& can be damaged if charged in sub-zero temperatures
-
Poor high temperatures performance as charging
efficiency drops to 25% when hot
-
Low
cycle
life
- Can require new charger or upgrade
- Higher internal resistance causing more rapid
voltage drop
- Higg self discharge rate
(while stored)
|
ALKALINE
BATTERIES
Alkaline batteries use electrochemistry
to produce electrical power that can operate the "Fireflies'
electronic circuits and light up the patented 'Firefly
LED'.
Alkaline battery chemistry is commonly
used by Duracell and Energizer batteries, where the
electrodes are zinc and manganese-oxide, with an alkaline
electrolyte.
The AA Alkaline battery can have approximately
2100-2500 mAh (milliamp hours) stored capacity when
new.
This is important as all AA batteries
produce approximately 1.5 Volts when new, but the current
rating
in mAh tells how long they'll last. That is how long
they'll operate the 'Fireflies'.
Because
Firefly Magic® uses their own patented
technical methodology to make the "fireflies'
operate so realistically, the amount of power (Voltage
x current = power in Watts) they use has been efficiently
reduced. This means the model FMS-14 unit with fourteen
'Fireflies' can operate continuously on just two
(2) AA batteries for approximately 4 weeks. While
the model FMS-07 with seven 'Fireflies' can operate
continuously for over 6 weeks.
Of course if you turn the 'Fireflies'
off during the day, the two AA Alkaline batteries will
last even longer.
While using standard AA Alkaline batteries
gives complete flexibility for having 'Fireflies' virtually
anywhere, it is important to never leave dead batteries
in the unit. This is because the electrochemical reaction
that produces electricity inside the battery can also
produce acid when the battery is depleted. This acid
is corrosive and if it leaks out of the battery case
will permanently damage everything it touches, especially
metal contacts.
This is why it is critical to never leave
dead Alkaline batteries in your Firefly Magic® Firefly
Lights unit.
CAUTION
- NEVER LEAVE DEAD ALKALINE BATTERIES IN THE UNIT
AS THEY WILL DEGRADE AND POSSIBLY LEAK ACID, CAUSING
PERMANENT DAMAGE NOT COVERED BY WARRANTY.
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