It can be replaced, it depends on the type of battery used by your desk lamp, if it is equipped with a charging head. Most of them are lithium batteries, which are better quality and more expensive. There is also a small lead-acid battery, which is cheaper but easy to damage. Plastic flashlights are mostly of this type. Chargers of this type are also very simple and most of them come with a power plug on the body. No matter what it is, you'd better take it apart and look at it, and buy it according to size and voltage. If you don't have one locally, you can purchase it online. Figure 1 below is a lithium battery and Figure 2 is a lead acid battery, for reference.
How to increase the battery capacity of a rechargeable desk lamp
Lithium battery for table lamp makesreference to a rechargeable battery with a lithium-ion battery as the core, which can be used for small desk lamps and other powered small household appliances. Lithium batteries have the advantages of high energy density, good storage efficiency and low self-discharge, so they have received widespread attention and application in the market.
The biggest advantage of lithium battery for desk lamps is its small size, light weight, fast charging speed and very good using effect. At the same time, the lithium battery of the desk lamp also has high-quality cells to ensure its stability and safety. In addition, lithium batteries have many recharges and a long service life, which can better meet consumers' needs for long-term use.
Currently, lithium batteriesfor desk lamps are mainly used in various small household appliances, such as LED desk lamps, portable small fans, etc. In addition, with the development of technology, desk lamp lithium batteries can also be used in vehicle electronic equipment and smart homes, with broad application prospects.
Many rechargeable LED desk lamps and flashlights now use 4V lead-acid batteries, which have a small capacity and a lifespan of about a year. As space for batteries is limited, replace them with. Larger capacity lead acid batteries will definitely not work and the external battery will need to be replaced with a high power charger (the built in charger uses a capacitor to lower the voltage, it is not safe if used externally). outside). Replace the battery with a batteryu lithium (4.2V) is a better way to save energy, protect the environment and increase capacity. Lithium batteries from discarded cell phones or laptops can be used. It is best to use lithium batteries of the same capacity in parallel. However, the charging circuit must be modified to use lithium batteries. You can use the original cell phone power adapter as well as one. charger instead.