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We use many gadgets like smartphones, laptops, wireless headphones, and many others regularly. These gadgets work with batteries that provide them with the chemical energy needed to function.<br><br>In the earlier gadgets, we used lead-acid batteries. These batteries were heavy and self-discharged a lot. They took longer times to recharge and were at constant risk of explosion. The batteries used in these gadgets are lithium-ion batteries. They are rechargeable and help in the functioning of many portable instruments and vehicles running on electricity.
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