Penlight batteries charging from USB

Batteries and rechargeable batteries, we're just surrounded by them. After all, they are used in almost every electronic gadget. And if you calculate, then we throw a lot of money to buy disposable batteries type AA and AAA.

The way out of this situation is to purchase rechargeable batteries - rechargeable batteries. But it should still buy a charger. In this article I want to tell you about the battery that does not need a battery charger and they charged from the usual USB connector.

External inspection of the product and technical parameters

This pair of batteries charging from USB I ordered on aliekspress site, and purchase cost me 293 rubles 70 kopecks.

These batteries are designed to power 1.2 VoltAnd the capacity is 1450 mAh. Charge-discharge cycles stated 500. The complete charging of the battery is fully discharged 7 o'clock.

A fully charged battery produces the following voltage:

Inserting a discharged battery in the USB connector red LED (which indicates that the battery began to charge) as soon as the battery is fully charged, the blue LED will light up.

Cap, cover up USB connector, rests on a small elastic band, so losing it is just not possible.

Only if you USB connectors arranged one above the other in a horizontal plane, the directly charging two batteries fail. Since its dimensions, they will cover the connectors.

In these batteries, used chemistry Nickel-metal hydride, Which has both its undoubted pluses and minuses. Let's use of chemistry discuss in more detail.

The advantages and disadvantages of nickel-metal hydride batteries

The advantages of these products include the following aspects:

1. Rather weak "memory effect", which allows to use such batteries are not waiting for a full charge.

2. Components that collected product is completely safe for the environment, that is, after the battery is completely exhausted their resources, you can throw it safely in the garbage.

3. Quite a large container with a modest size.

4. Transport and storage is not difficult.

The disadvantages include the following aspects:

1. Perhaps the most significant drawback of such batteries is their quite substantial self-discharge. That is, if you do not use, such as a flashlight with inserted batteries, they still continue to be discharged.

2. Charging current is quite restrictive. When charging high current the battery life is greatly reduced.

3. In order to prevent the crystallization process still need to periodically perform a full discharge and charge the batteries.

4. The capacity is sharply reduced after 300 charge-discharge cycles.

5. The charging process from an external source requires compliance with a complex algorithm which should be reduced to minimize heat dissipation.

Especially with the use of these batteries USB

Thus, knowing the advantages and disadvantages of chemical used, it is possible to deduce the following features use of the battery, namely:

Such batteries are better not used in products with low discharge current, i.e., for example, in consoles, watches and so on. N. these batteries are highly inefficient.

Best of all batteries with USB suitable for cameras, flashlights, toys and so on. d. in general, for any type of gadgets use batteries AA and working in a periodic cycle.

conclusion

To sum up, the following conclusions: if you already have rechargeable batteries with a good charger, then you are not interested in these rechargeable USB batteries AA. And if you are still in thought what to buy, then pay attention to these batteries. By the way, I bought them in this store.

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