Cinema and Broadcasting Batteries and Circuits

Rathbone Energy, Inc.

On High Load Issues

Being “the only Battery Assembler” Worldwide that supports rebuilding battery packs, Rathbone Energy
understand battery specification sheets verses real world applications.  That is
why so many battery companies come to our web site.

Lithium Ion “High Load” issues:

1.     
The Best available Nickel Cadmium Press Negative battery cells and Nickel Metal Hydride
Foam Paste Negative battery cells, under “high load” even a constant 48WH, or
heat, will deteriorate as fast as the Best Available Lithium Ion cells.

Constant High Load, Heat, and Very High Impulse discharge will definitely eat
away at the “ideal world” discharge specifications of any brand battery cell
pack. My web sites have the specification sheets for LG Chem, Panasonic, and
Sanyo Brand Lithium Ion, Nickel Cadmium, and Nickel Metal Hydride battery cells.

2.     
Consider “Best Available” LG Chem – South Korea, Panasonic-Japan,
Sanyo-Japan, “BEST Available”), NO CHINESE BATTERY CELLS:

a)    
Nickel Cadmium-Sintered Positive Electrode: 1200 Discharge Cycles
–Quality models are gone, No Longer Available, Not green, and are being banned
in many countries.  Of the chemicals listed this one has the broadest
temperature range.

b)    
The next three chemical compounds are more narrow in discharge cycles,
durability, impulse-high discharge, and  temperature range

c)    
Nickel Cadmium-Press Negative: 500 Discharge Cycles – Poor Durability,
Not green, and are being banned in many countries.

d)    
Nickel Metal Hydride-Foam Paste: 500 Discharge Cycles –
Equivalent to Nickel Cadmium Press Negative in Quality and Temperature Range.

e)    
Lithium Ion: 500 Discharge Cycles
and 60% of the broadcast market has already gone to
lithium ion.

3.     
Rathbone Energy lithium ion battery cell options such as our Rathbone Broadcast Lithium Ion battery
packs have a discharge cycle life expectancy of 500 discharge cycles and
Rathbone packs are built flat to help dissipate heat.  But, with any and ALL
battery cells, high heat and high load more quickly degrade the battery cells
reducing their life.  It is a cost of doing business.  When I have nickel
cadmium or nickel metal hydride batteries come back under warranty inspection I
almost always discover either lack of proper maintenance requiring a few recondition procedures or serious venting of the cells.  This type venting is caused by multiple and long term high load and high discharge rates.  It is NOT warranty and the
cost to evaluate what they already know is $75.00.  My average active and
passive labor and equipment usage per warranty inspection claim is an extensive 92
hours.

4.     
Actually, with a 95WH or more battery you should get about 300 discharge cycles before seeing
noticeable degradation.  Of course, manufacturing specifications from every
manufacturer considers a battery good until they reach 50% capacity.  My
standard is that 60 % would be normal.

5.     
I suggest using a
T adaptor plate such as our Rathbone RBMB-TDVP90
T Shape Dual V Mount Adaptor or
RBMB-TDGP90 T Shape Dual G Mount Adaptor allowing your system to pull
from two lithium ion batteries at the same time or elect our more robust brief
case style lithium ion batteries delivering up to 600WH, all found at

www.rathbonebroadcastbatteries.com

6.     
No Value Added Distributor does rebuilding except Rathbone Energy, all have 5000 piece
minimum orders.  At the 1^st of the 4^th quarter of each
year end the battery cell manufacturers and value added distributors like me
begin unloading any battery cell model still on their shelves without incoming
replacement inventory.  More unpopular battery cell models may sit in their
warehouses for long periods of time for many, but not me.   Value added
Distributors then begin to re-stock their shelves in mid 1^st quarter
of the next year. 

a)    
Rebuilders call
value added distributors like me or distributors who buy from value added
distributors like me and say, “I need battery inserts to fit this bla bla.  What
is the best price you can give me?”  No idea of cell quality, age, or testing,
just ability to hopefully attach a wiring harness to an insert as long as it
gives a voltage and glue the package

b)    
At this point I would NOT waste my money on Nickel Cadmium even if through the OEM, new! 

i)      
How long did that
battery sit on a distributor shelf before being bought by you?

ii)     
Considering the
new discharge cycles I would also not spend money on nickel metal hydride. 
Nickel cadmium-500 Discharge Cycles, Nickel Metal Hydride-500 Discharge Cycles,
New LG Chem, Panasonic, and Sanyo, “Best” Lithium Ion-500 Discharge Cycles. 
That is why we are focusing on our Rathbone Lithium Ion Broadcast Batteries.  We
can retrofit belts with adaptor plates for our Lithium Ion Batteries.

Thank you for thinking of me.

Sincerely,

Ron L. Rathbone

There’s a
better way – rathboneenergy.com – when cell quality is paramount.         

Copyright Rathbone Energy 1991 – 2xxx