There are two things to consider when buying batteries. One is the size and shape of it- most devices only accept one size of battery, so that’s usually not an issue. However, another choice is the type of technology that powers it. For example, the common AA battery size is available in zinc carbon/zinc chloride, alkaline, lithium and NiCd and NiMH rechargeable forms. Each of these battery types offers advantages and disadvantages. Read on to find out more.

Alkaline batteries

Alkaline batteries are probably the most popular type. They provide high levels of power for a long period of time- far longer than old-fashioned zinc carbon batteries.

Due to the way digital cameras detect and use power levels, certain cameras will report alkaline batteries as “flat” much quicker than expected. Such batteries still have plenty of power left (around 80%) and can be used fine in other devices. However, if your camera does this, we recommend single-use Lithium or rechargeable NiMH batteries instead.

Zinc Carbon and Zinc Chloride single-use batteries

Although they are very cheap, zinc carbon and zinc chloride batteries are also old-fashioned and low-powered by modern standards. We recommend them mainly for devices with low power needs (e.g. television remote controls).

Some zinc chloride batteries are marked “heavy duty”, but don’t be fooled- these are still low-powered compared to alkalines, lithiums and NiMH rechargeables.

Rechargeable NiCd and NiMH batteries

These are a great way to save money, because they can be recharged hundreds of times when used with a suitable charger.

There are two main types of rechargeables; NiCd (Nickel Cadmium) is the older type, but the newer NiMH (Nickel Metal Hydride) ones have a much higher capacity- comparable to single use alkalines- and are more environmentally friendly.

Why not take a look at our main batteries page for a range of batteries at competitive prices.