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Carbon zinc
(dry cell)

400-900 mAh

• Inexpensive.

• Poor shelf life, temperature dependant (approx 15% loss per year - ideally store in fridge or freezer; over 45°C completely discharged in one year).
• Poor storage density, especially in high current situations (strong Peukert Effect).
• Not suited for medium or high current uses.
• Can leak when old (and sometimes not very old).

Carbon zinc, heavy duty, "super heavy duty"
(zinc chloride)

1000-1500 mAh

• Inexpensive, readily available.
• Lasts longer than ordinary carbon zinc batteries in higher current situations, and slightly better in cold and hot situations.

• Poor shelf life (ideally store in fridge or freezer).
• Poor storage density, especially in high current situations (strong Peukert Effect).
• Not suited for medium-high or high current uses.
• Can leak when old.

Alkaline

1700-2850 mAh

• Long shelf life (approx. 5% loss in first year, 2% in subsequent years).
• Readily available and thus quite inexpensive these days (depending on brand).
• Excellent value for money for low to medium drain (<500mA).
• Depending on the application, alkaline cells can last for four to nine times the life of more traditional carbon-zinc cells. The advantage is greatest under heavy loads that are infrequently used - that is, something that draws heavy current for half an hour once a day rather than for a few minutes of each hour.

• Capacity is reduced at high current draws (Peukert Effect).
• Can leak potassium hydroxide when very old.

Alkaline, modified

(eg, Duracell Ultra, Energizer e2)

Up to 2900 mAh

• Long shelf life.
• Higher short-circuit current output than standard alkalines because of lower internal resistance.
• Designed to be more suited to high current situations than standard alkaline (lower Peukert Effect than standard alkalines).

• Capacity is still reduced at high current draws (Peukert Effect still present).
• At end-of-life its voltage drops more suddenly than standard alkalines.

Nickel Zinc
(NiZn)

eg, GP Digi1

• Good performance in high current applications, comparable to modified alkaline (eg, Duracell Ultra, Energizer e2).
• Higher average voltage (and therefore more watts) over useable life than alkaline batteries.
• Excellent value for money in high current situations (compared with other non-rechargeable batteries).

• Hard to find - in NZ they are only sold as AA cells at Dick Smith Electronics (4 pack, 2 pack). They're running low, and apparently selling out: NOOO!!!
• Prices around the world vary by a factor of 10.
• Similarly variable voltage to alkaline (starts @ 1.7V, ends @ 1.0V; alkaline start @ 1.6V, finish at 0.9V if you're lucky).
• The higher voltage may not be good for some devices.

Nickel Oxyhydroxide
(NiOOH)

• Good performance in high current applications, comparable to modified alkaline (eg, Duracell Ultra, Energizer e2).
• Higher average voltage (and therefore more watts) over useable life than alkaline batteries.
• Good value for money in high current situations (compared with other non-rechargeable batteries).

• Still uncommon.
• Similarly variable voltage to alkaline (starts @ 1.7V, ends @ 1.0V; alkaline start @ 1.6V, finish at 0.9V if you're lucky).
• The higher voltage may not be good for some devices.

Lithium iron-disulfide
(eg, lithium AA)

3000 mAh
200 Wh/kg

• Very long shelf life.
• High current output.
• Begins to be cost effective in high current situations (>1A) because of lower Peukert Effect than other chemistries.
• Light weight.
• Good performance in freezing conditions.

• Very expensive.
• Not cost effective in low and medium current output situations.

• Small size/weight.
• Cheaper than alternatives (such as silver oxide).

• Low current output (which may be a desireable feature if, for example, running LEDs).

• Small size/weight.
• Good storage density.
• Extremely level output voltage curve during life.

• Low current output (which may be a desireable feature if, for example, running LEDs).

• Small size/weight.
• Good storage density.
• Extremely level output voltage curve during life.
• Higher voltage than other button cells.

• Low current output (which may be a desireable feature if, for example, running LEDs).

Zinc air button

220-300 Wh/kg
900 Wh/L

• High voltage, 1.65V per cell (no load).
• Very level discharge curve.
• Extremly long shelf life (approx. 2% loss per year).
• Very high storage density because it doesn't carry its own oxidiser (it uses oxygen from the air).
• Best used in often-used or always-on situations.

• Short life (a few months) once packet is opened.
• Low current output due to high internal resistance.

Panasonic's Oxyride battery (available in AA and AAA sizes) appears similar to NiZn technology, if not the same thing. They replace the managnese oxide electrode found in a normal alkaline cell with nickel oxyhydroxide (NiOOH). Presumeably zinc remains in the other electrode - they have a similar initial voltage to GP's NiZn batteries. Panasonic claims the Oxyride technology is the biggest advance in single-use battery technology in 40 years.

Panasonic got Oxyride on the market in April 2004 and in their first year had captured 10% of the market share - an indication of how good they are for a new product in a very competitive market. Panasonic demonstrated two AA Oxyride batteries powering an 18kg car with 47kg driver for 1.23km (at a slow walking speed) and in a later demonstration used 160 Oxyride batteries to power a light-weight aeroplane. It carried a 53kg pilot for a 391 metre flight lasting just under one minute.

The next generation of Oxyride batteries will supposedly have even better performance in digital cameras but it's said they won't do as well in always-on situations.

Kodak's Oxy-Alkaline AA cells apparently also use NiOOH chemistry, since in a recent Consumer magazine test they performed similarly to the Panasonic Oxyride cells... but cost 50% more.

Duracell have also now released their version of the NiOOH cell, which they call PowerPix, "a battery that is designed using NiOx™ Technology, based on nickel oxyhydroxide chemistry".

 
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