Data Hacking

FIGURE 3-2: AA lithium batteries
Chapter 3 — Power Hacks
Lithium batteries have an excellent lifespan in use, and a very long shelf-life. They also offer
excellent cold weather performance, and are lighter than alkaline or rechargeable batteries.
However, they’re generally not widely available; and as mentioned above, they are very expensive.
Rechargeable (NiMH) Batteries
By far, the best way to invest your money is on rechargeable batteries. Get the best possible
batteries, which means choosing nickel-metal hydride batteries (NiMH), shown in Figure 3-3,
rather than the older and inferior nickel-cadmium (NiCd) batteries. In addition, choose the
batteries with the greatest capacity (over 2000 mAh, preferably 2300 mAh or greater). The rule
is that the greater the mAh (milliamp hour) capacity, the longer the batteries will last. These
batteries will initially be more costly than alkaline batteries — especially if you figure in the cost
of the charger too — but they can be recharged hundreds, if not thousands, of times.
Although some systems on the market claim to be able to recharge ordinary alkaline batteries, I
don’t recommend them. They are not recommended by battery makers; and not only do they
invalidate any warranty on the battery (such as the leakage warranty), but they also increase
the risk of the battery damaging your device. Play it safe and get proper rechargeable batteries
and chargers.
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