The Krona battery is one of the easiest sources of electricity to use. Thanks to the original terminals of this battery, polarity reversal is practically eliminated, and the rectangular elongated shape does not allow the battery to be placed inside the product differently than what was intended by the engineers.
Unfortunately, it is not always possible to purchase high-quality products. Therefore, it is necessary to learn how to choose products that will last for a long time.
Technical characteristics 6F22
First of all, you should determine the characteristics by which this battery can be distinguished from other batteries.
The main parameters of 6F22 are:
- Type – Crown.
- Voltage – 9 Volts.
- Capacity – 500 mAh.
- Height – 48.5 mm.
- Width – 26.5 mm.
- Thickness – 17.5 mm.
- Weight – 53 g.
Almost all types of Krona batteries have similar characteristics, only in alkaline devices the capacity can be 625 mAh.
Chargers for 18650 batteries
Chargers for 18650 batteries nowadays have the following requirements:
- Versatility in the format of chargeable elements;
- Compatible with batteries of various chemical compositions;
- Automatic detection of cell type and installation of the appropriate charge mode;
- Ability to test and determine capacity;
- Protection of charging and batteries.
- A wide variety of standard sizes (formats) and chemical compositions of batteries used in household appliances and electronics creates demands for versatility and wide compatibility of chargers. Therefore, as a rule, a charger for 18650 Li-Ion batteries can also charge other sizes, as well as Ni-Cd and Ni-MH AA, AAA cells.
- Auto-detection of the type of elements and automatic installation of the correct charging mode allow you to avoid manual calculations and setting the required charging current.
- Testing the capacity of the secondary power supply makes it possible to assess its condition and replace it in time.
- Protection against overheating, reverse polarity (wrong installation of the element) and overvoltage allows you not only to keep the charger for 18650 batteries in working condition, but also not to worry about the destruction or fire of the batteries being charged.
The best chargers for 18650 batteries
Currently, 18650-size are the most popular power supplies for electronics. Most often, chargers for 18650 batteries are quadruple or double in order to charge the entire set of batteries used in a particular gadget at once. The best chargers in this segment are Nitecore D4, NiteCore V2 Intellicharge I4, Nitecore UM20, Robiton Mastercharger series and Kweller X-1900, X-1000 and Kweller D-500 chargers.
The Nitecore Digicharger D4 intelligent four-channel charger with display has many advantages:
- AC power supply over a wide voltage range from 100 to 240 Volts (50 or 60 Hz);
- Possibility of power supply from 12 V DC, for example, in a car;
- compatible with lithium batteries (Li-ion / IMR / LiFePO4) formats 26650, 22650, 18650, 17670, 18490, 17500, 18350, 16340 (CR123), 14500 and 10440;
- compatibility with nickel-cadmium and nickel-hydride cells of standard sizes , AAA, AAAA and ;
- automatic recognition of the battery type and selection of the optimal charging mode.
NiteCore D4.
Charging for 18650 batteries Nitecore new I4 is almost identical in capabilities and characteristics to the D4 model, but differs in some parameters:
- LED indication instead of LCD display;
- the ability to charge a wider range of standard sizes of lithium-ion batteries;
- incompatibility with lithium iron phosphate batteries;
- more favorable price.
Photo NiteCore i4 .
the Nitecore UM20 dual-channel charger are:
- powered from a USB port or network adapter with a voltage of 5 V;
- charge of lithium-ion batteries 18650, 18490, 18350, 17670, 17500, 16340, 14500, 10440 sizes;
- protection against polarity reversal and overheating;
- USB output for charging a smartphone.
Photo of NiteCore UM20 .
the Robiton Mastercharger Pro automatic charger :
- power supply from a network of 100 - 240 V or from direct current with a voltage of 12 V;
- individual current selection for each channel;
- normal charge or reduced current;
- four-channel display;
- discharge with capacity determination;
- USB port for charging smartphones and other gadgets;
- ability to charge batteries 18650, 17670, 18490, 17500, 18350, 16340 (CR123), 14500 and 10440, 26650, 22650, AA, AAA, C, SC.
Charging Robiton MasterCharger Pro .
The Kweller X-1900 black smart charger has the following features:
- charge mode and Power Bank mode for charging cell phones;
- two types of test to check battery capacity;
- the ability to simultaneously use different channels in different modes;
- Compatible with lithium-ion, nickel-cadmium and nickel-metal hydride cells.
Charging Power Bank Kweller X-1900 black.
The advantages of the 18650 battery charger
Power Bank Kweller D-500 are:
- charging 18650 lithium-ion cells (with and without protection) or using them as a Power Bank;
- uninterruptible power supply mode (simultaneous charging of elements and their discharge in the Power Bank);
- all types of protection: from overcharge, deep discharge, polarity reversal, short circuit, excess current or voltage;
- automatic switching to “drip” charge;
- liquid crystal display.
Photo of charging for 18650 batteries Kweller D-500 .
Analogues of the 6F22 battery
The 6F22 battery has a fairly large number of analogues. They may have slight differences in capacity and type of electrolyte.
The most common types of Krona batteries on sale are: 1604, 6R61, 1604A, 6LF22, 6LR61, MN1604, MX1604, PP3 E-Block, Brick Battery 9V, AM6, Corundum, 6AM6, CR-9V and ER9V.
Any of the listed analogues can be used instead of the standard “Krona”, but if you need an element that will last the maximum amount of time, then you should use lithium batteries, for example, ER9V . In addition, the “Krona” varieties are very popular, the charge of which can be restored using a charger operating from a 220 V electrical network.
Chargers for Krona batteries
Despite the great popularity of Krona batteries, chargers for them are rarely specialized, such as Robiton 9V20-2 or Vanson V-228. More often, chargers for AA AAA batteries are complemented by the ability to charge Crowns, as is done in Robiton SmartCharger Pro, SmartCharger IV, Smart S500 plus.
The charger for the Krona 9v Robiton 9V20-2 battery is designed to charge one or simultaneously two nickel-metal hydride (nickel-cadmium) 6F22 cells. This charger charges a 250 mAh cell in approximately 14-15 hours. Technical parameters of the device:
- channels - two;
- charge current of each channel - 25 mA;
- charging process control - manual;
- indication - LED.
Charger for Krona Robiton 9V20-2 .
The Robiton SmartCharger Pro universal automatic charger provides charging of Ni-MH/Ni-Cd batteries AA/AAA/Krona, as well as Li-Ion sizes 18650, 14500, 18500, 16340 (CR123A). The package also includes a cigarette lighter cord for charging power from the vehicle's on-board power supply. Technical characteristics of this charger:
- supply voltage - alternating 100 - 240 V, constant 12 V;
- output voltage - 1.4, 3.7, 4.2, 5.0, 8.4 V;
- type of charged elements - Ni-MH, Ni-Cd, Li-Ion, Li-Pol, LiFePO4;
- display - liquid crystal;
- charge channels -2.
Photo of the charger for Krona/AA/AA/CR123/18650 Robiton SmartCharger Pro .
You can choose and buy a charger for batteries 18650, 16340, AA, AAA, CR123A, Krona 9v with delivery to your city in our Volta online store. Our digital equipment store offers a wide selection of high-quality chargers at minimal prices with a guarantee of excellent quality and delivery throughout Russia. The range of battery chargers includes the best models from foreign manufacturers Panasonic, NiteCore, Technoline, Robiton, Kweller, MAHA, Xiaomi, Vanson, La Crosse, Liitokala, Duracell, Fenix. From us you can buy automatic chargers with protection against overcharging, overvoltage, overheating and reverse polarity.
Popular manufacturers and their features
The Krona battery can be produced by many companies, but most often this battery can be found on store shelves under the following brands:
- Energizer - under this brand the Krona battery was first released and over more than half a century of history, the quality of the battery has only improved. Thanks to the use of alkaline electrolyte, the battery will last several times longer than conventional salt batteries of this type.
- Panasonic - “Krona” from a well-known manufacturer of electrical appliances is distinguished by its increased quality, which is manifested, first of all, in an increase in service life. Particularly “long-lived” are alkaline batteries, which will last 3 to 5 times longer than conventional salt batteries.
- Camelion - the battery of this company is characterized by stable operation for a long time. Ideal for devices where replacing the battery requires significant disassembly of the device case.
- Daewoo - a source of constant 9 volt electricity from this manufacturer also has good resistance to significant load.
- Varta - a battery from a well-known battery manufacturer has an increased service life.
- Samsung pleomax - a battery from this company is ideal for devices in which the electrical current consumption is not too high.
- Trophy - the products of this company also meet all the necessary requirements, therefore they can be successfully used to replace 6F22 installed in almost any electrical devices operating at a voltage of 9 volts.
- Cosmos - “Krona” from a well-known domestic manufacturer of electrical equipment is not inferior in quality to the best imported samples.
- GP – if you need to purchase a “Krona” from this manufacturer, then the best option would be the gp supercell 1604s model, which has one of the best power ratings among similar products.
Chargers for AA AAA batteries
Most chargers for AA AAA batteries are designed to be compatible with Ni-MH and Ni-Cd, as these are the technologies used to produce batteries for mass use. To charge AA Li-Ion cells, we recommend using universal chargers for size 18650. Nickel-metal hydride cells are much less critical to overcharging and are not at all prone to spontaneous combustion, so some chargers for AA batteries do not have protection. However, most models are equipped with reverse polarity and overvoltage protection.
The best chargers for AA AAA batteries
The best chargers for AA AAA batteries are models from the Japanese company Panasonic of the Eneloop series: Pro K-KJ55HCD40E Smart Quick, BQ-CC17 Advanced and K-KJ55MCC40E Smart&Quick. The chargers MAHA Powerex MH-C900, Technoline BC-700, Robiton Ecocharger AK02, as well as Xiaomi ZMI PB411 and ZMI PB401 have proven themselves to work very well.
The Panasonic Eneloop Pro K-KJ55HCD40E Smart Quick charger comes complete with four Panasonic Eneloop Pro AA 2500 mAh nickel-metal hydride batteries. This charger has many advantages:
- fast charge Quick Charge;
- compatible with AA and AAA batteries;
- protection against temperature and voltage factors;
- intelligent charge Smart Charge with auto-detection of battery type;
- four independent channels;
- LED indication.
Photo of Panasonic Eneloop Pro K-KJ55HCD40E Smart Quick.
The Panasonic Eneloop BQ-CC17 Advanced charger is easy to use and reliable. At the same time, it has the following capabilities:
- automatic charging control;
- compatibility with Ni-Cd and Ni-Mh batteries in AA and AAA formats;
- AC input voltage from 100 to 240 V;
- led indicator.
Photo of the Panasonic Eneloop BQ-CC17 Advanced model.
The MAHA Powerex MH-C900 charger for AA/AAA batteries (Ni-Cd/Ni-MH) has outstanding parameters:
- 5 operating modes: charge,
- discharge,
- "molding"
- cyclical,
- regeneration and analysis;
Powerex MH-C900 charger .
The smart four-channel charger Technoline BC-700 uses microprocessor control to control the charging and discharging processes of AA/AAA Ni-Cd and Ni-MH batteries with full information displayed on the liquid crystal display. The following modes are possible:
- charging different types of cells in different channels simultaneously;
- three current values for charge and discharge;
- discharge and capacity testing;
- restoration of elements.
Charging Technoline BC-700.
The Robiton Ecocharger AK02 charger can charge AA/AAA batteries of nickel-cadmium and nickel-metal hydride types, as well as recondition alkaline alkaline batteries. The model is equipped with microprocessor control and has some features:
- automatic detection of the end of charging and transition to capacity maintenance mode;
- protection against overheating and incorrect switching on (reversal of polarity) of the element;
- manual switching between charge and recovery modes;
- safety timer that turns off the device after 9 hours.
Charging AA/AAA batteries Robiton Ecocharger AK02 .
The USB charger for AA/AAA batteries Xiaomi ZMI PB411 is practical and low in price, and the kit also includes four AA 1700 mAh batteries. This model has the following characteristics:
- powered by USB port;
- charge channels - four;
- charging control type - automatic;
- type of rechargeable batteries: Ni-MH, Ni-Cd;
- standard size: AA and AAA.
Xiaomi ZMI PB411 charger .
Precautionary measures
Even reliable devices can sometimes fail or operate incorrectly, therefore, if it is necessary to recharge the Krona battery, it should not be left in the charger slot unattended for a long time.
Lithium batteries can catch fire when attempting to recharge or when the case is accidentally or intentionally depressurized. For this reason, batteries of this type should be handled with the utmost care.
There is no need to invent chargers for rechargeable batteries yourself. There are a sufficient number of working diagrams on the Internet that can be used to make chargers at home.
When using such charges, you should also try not to leave the device turned on unattended, and also observe the polarity, that is, connect the plus to the positive contact, and the minus to the negative.
Most radio amateurs use digital multimeters that are powered by rechargeable batteries or Krona batteries.
At the same time, taking into account the law of meanness, they are always discharged at the most inopportune moment, when the performance of the entire project depends on the accuracy of measurements.
After visiting the store, I decided for myself that using a Krona battery is more economical than constantly buying and keeping a battery in stock. But this is only if the battery is used correctly.
Therefore, a simple charger was required. It can be purchased in many stores. BUT! Like many of you, I am not looking for easy ways. And it’s much more interesting and useful to come up with a scheme, assemble it, and set it up for high-quality work.
This is the charger I got.
This device allows you to charge Krona type batteries – 2 pcs. separate channels with optimal charging current (1/10 of the capacity) and has LED indication.
The indication consists of two LEDs. The 1st indicates that the battery is more than 50% discharged. 2nd – indicates that the battery is charged and can be removed from the device.
In addition, charging a discharged battery occurs in two stages: constant current charging and constant voltage charging.
Let's analyze the operation of the circuit. The circuit is powered by a constant (rectified) voltage from 12 to 30 V. But an increased supply voltage will cause a higher voltage difference across the LM317, which will lead to its heating and the need to install a heatsink. Therefore, I recommend powering the circuit with 12-15 V.
Turning on the LM317 in voltage stabilization mode allows you to obtain a constant (unchangeable) voltage at the output of the microcircuit when the supply voltage changes.
After LM317, a current stabilizer is made using two transistors. When we connect the terminals to a discharged battery, the voltage drop across the 27 ohm resistor significantly exceeds the opening threshold of the second transistor, which leads to the LED turning on and the first transistor partially closing and, thereby, limiting the charge current.
During the battery charging process, the voltage drop across the 27 ohm resistor at a certain moment closes the second transistor, which leads to an almost complete opening of the first transistor, which means that almost all of the input voltage goes to the emitter of the transistor, that is, to the output.
This ensures a safe charging current for the battery Krona.
The operational amplifier OP (LM358) acts as a comparator that monitors the voltage at the battery terminals and compares it with the installed variable resistor. As soon as the voltage exceeds the set value, the second LED will light up, indicating that the battery is charged.
We begin the setup by setting the output voltage. To do this, connect a voltmeter to the output terminals (without load) and use a trimmer resistor (in the LM317 stabilizer circuit) to set the voltage to 9.1-9.2V.
Next, to configure the operation of the LED, signaling the end of charging, we connect a voltmeter to the output terminals and connect the Krona battery. As soon as the voltage reaches 9V, rotating the trimming resistor (in the LM358 circuit) turns on the LED. This operation requires quite a lot of patience and precision, so I recommend using multi-turn resistors.
After adjustment, these resistors are covered with varnish or wax to eliminate the possibility of disrupting the previously made adjustment.
The board layout is made taking into account the available parts.
The board was manufactured using the LUT method and etching in ferric chloride.
The proposed charger does not contain scarce parts and is very easy to replicate.
The operation of the device has been tested on batteries from several manufacturers.
With respect to the VIP-CXEMA project,
Ivanov Maxim N., Vologda, 2015.
