How to Power Digital Camera with AA Lithium Battery

Due to design and technical problems, some of the early digital cameras often affected normal shooting applications due to large power consumption and unsustainable batteries. In particular, some cameras using AA batteries can also be recharged with nickel-metal hydride batteries. However, the nickel-metal hydride battery filled with electricity can not take many photos to indicate that the battery is insufficient, and it is automatically turned off. In fact, the battery power is still sufficient at this time, but the voltage is low(the rated voltage of the nickel-metal hydride battery is 1.2 V, not 1.5 V of the alkaline battery).

My friend has a Nikon's Coolpix3200 digital camera, but it is often unable to use it properly due to battery problems. If you buy alkaline batteries for use, two AA alkaline batteries can generally only take more than 100 photos, which is obviously too expensive; If you use AA nickel-metal hydride batteries, full of electricity can only take more than 30 photos, indicating that the battery is not enough power. In fact, the nickel-metal hydride batteries that have been removed can also be loaded into the razor for a period of time.

Not long ago, I saw on the Internet that there were 900mAh AA lithium batteries for sale. Each price was only 10 yuan, and I bought a few trials. This lithium battery has the same shape as an ordinary battery No. 5, but the rated voltage is 3.7 V and it can reach 4.2 V when full. If you put lithium batteries directly into a digital camera, you also need to make a "fake battery" that can conduct electricity in the same shape as the No. 5 battery. I used bamboo chopsticks to cut a section of 48 mm in length, and the two ends were wrapped with conductive thin copper pieces to make a "fake battery"(with several layers of thick paper on the outside to achieve a suitable shape diameter). To protect the digital camera, I also attached a 1N4002 diode between the poles of the "fake battery". When the "fake battery" is loaded into the digital camera with a lithium battery, it is equivalent to a series of Buck diodes. It can reduce the voltage of the lithium battery by about 0.6 V. In this way, the voltage that the lithium battery actually supplies to the digital camera is about 3.2 V-3 .5 V, which should be safe.

After the actual trial, I felt very satisfied. Each time a lithium battery is loaded into a digital camera(of course, a "fake battery"), full of electricity can take 150 photos. Usually I can go out to shoot with a battery that is full of electricity. Two batteries can be replaced to take about 300 photos. It can basically meet the requirements of daily shooting. If you are traveling, you can also bring a charger, the battery will be charged every night, very convenient to use.

To charge this AA lithium battery, I bought a "universal charger" to charge my cell phone battery, and made a simple battery clip and electrode plate for connecting the "universal charger" using printed circuit copper foil. When charging the battery, place the battery in a simple battery clip, and then place the electrode plate on the "universal charger". At this time, the red indicator light on the "universal charger" indicates that it is ready and can be plugged into the power socket to charge. This "universal charger" has an automatic charging protection function. The charging indicator light on the "universal charger" continues to flash during charging. The flash stop when it is full of electricity. The green indicator light is lit and the charger and lithium battery can be removed later.

This type of AA lithium battery is called "naked core" and should be used with special care. Because the finished digital camera lithium batteries are equipped with protective batteries, the charging and discharge of lithium batteries can be protected. This "naked core" does not have a protective circuit. If it is short-circuited or "overcharged," it will be dangerous. Because the "universal charger" that charges the cell phone battery has charging protection function, it can be used safely; However, it is always necessary to take strict care to avoid short circuit of batteries, and batteries full of electricity must be stored in plastic boxes alone. I used a clean plastic medicine bottle to store AA lithium batteries separately.

The page contains the contents of the machine translation.