dry cells

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Cameras, clocks, radios, toys need batteries. These dry cells convert chemical energy into electricity. The cheaper ones are the older zinc carbon batteries, and theres the alkaline variety-costlier but hold their charge longer. here are some things you need to know about the batteries:- POWER Power problems are usually the reason why appliances go dead. So, try replacing their batteries first instead of taking them for repairs right away. A camera for instance, needs power for motors, LCD screen, flash, the shutter mechanism and more. New batteries may be all it needs to start clicking. CLEANING Cleaning an appliances metal contacts that touch the batteries is another way to restore power, in case your flashlight. walkman or toy is not further functioning. Oxidized or grimy contacts keep the current from flowing freely. Clean contacts carefully with a cotton bud dipped in alcohol or cologne. If they are coated wuith more stubborn grime, try rubbing with fine sandpaper till they shine. BUY batteries from shops where things move fast. Dry cells have a certain shelf life and will run out of power faster if they have been in a shop foe more than 18 months. Check the date of packing while buying, just as you would for processed foods. USE rechargable cells if a gadget, like a walkman or FM radio, needs frequent battery change. Rechargable batteries are costly, but they will pay for themselves with a few monthes of re-use. They are usually sold in packs of four along with a charger. Keep one pair charged while the others are in use. REMOVE batteries from an appliance you wont be usingfor a while, even if it says "leak proof" any battery can leak chemicals when left in an appliance for too long and damage it beyond repair.