Cells 5 or 7 are still commonly used in some portable appliances, such as digital cameras, electronic sphygmomanometers, various electric toys, remote controls, and so on, especially when some of the more expensive batteries are often replaced by batteries, we choose to use rechargeable batteries. The early chargeable batteries are nickel cadmium batteries, which can be recharged approximately 500 times over and over again at working voltage 1. 2v, although they have a memory effect and, if they are not fully charged, will gradually reduce the actual usage capacity. For this reason, it was gradually replaced by another hydrogen nickel battery that had no memory effect. However, the working voltage of this battery is still 1. 2v, which is larger than the 1. 5v of a regular dry battery, causing some appliances to work abnormally and not to use them。
In the last two years, this net purchase has found a recharging 1. 5v constant pressure of the same size as normal dry batteriesLithium batteriesI don't know. In terms of product promotion, this type of battery is indeed the ideal alternative to dry batteries, and the price does not seem to be too expensive now, with a cell number five estimated at $9-10 (the price of the charger is evenly distributed), while a regular alkaline one-time battery costs $2. The former is said to be capable of recharging a thousand times, so that it would be cost-effective to charge 1. 5v lithium batteries using dry batteries in large quantities。
Lithium batteries do have excellent recharge performance, as can be seen in the universal application of mobile phones. But the working voltage of lithium batteries is 3. 7v ~4. 2v. It's impossible to have a 1. 5v lithium battery. With this question in mind, i have purchased an internet-based package of 1. 5 v-percent lithium batteries with four five-size batteries and chargers, which has been used and studied in practice, thus discovering the "secret" of this dry battery. It can be described as an electrical reverser with lithium batteries or an electronic battery。
This battery has been dissected before and consists of a smaller lithium battery (with a voltage of 3. 7-4. 2v) and a power transformer, installed on a small circuit board, which has two functions, one of which is to charge the lithium battery in which the usb charged a voltage of 5v by limiting the current pressure; the other function is to convert the lithium battery's voltage of 3. 7-4. 2v into a 1. 5v power source output for the operation of the battery, which handles a single tsetse a6017。
In order to confirm my idea, i specifically intended to measure the chargeable battery end voltage with a meter when the battery is charged, and it's 5v, not 1. 2-1. 5v for the ordinary battery charger! So this battery configuration chargers cannot charge other chargeable batteries。
In terms of the operation and actual use of this battery, the actual performance of the battery is indeed good, providing a perfect replacement for dry cells of 1. 5 v of various specifications (with no. 5 and no. 3 etc.), smooth discharge and guaranteed recharge. Electrical and field applications that require frequent use of dry batteries are particularly suitable。
It is worth noting that it is important to distinguish between these chargeable batteries and the traditional 1. 2v hydrogen nickel batteries, and not to mix them with the usual 18650 lithium batteries。
