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Accumulator Li-Ion 20V, 2Ah, WAINER C2
2490007
Available
lei55.00
Tax included
Any WAINER battery tool is compatible with C2, C4 or C6 batteries and K or L chargers. So, if you buy a charger and a battery now, in the future you can buy only the tool you need, saving money like that!
The WAINER C2 battery uses 5 18650 2000mAh cells connected in series, reaching a maximum voltage of 21V and a capacity of 2Ah, weighing 335g.
Specifications:
Output voltage: 20 Vac
Capacity: 2Ah
Weight: 335g
Practical Guide to Understanding Tool Accumulators
Voltage and How to Check it
- The voltage of a battery indicates the voltage supplied and is easily checked with a multimeter. For example, a battery that says 10.8V or 12V means the same thing: the nominal voltage is 10.8V and the maximum fully charged voltage is 12V .
- Other examples include:
- 14.4V / 16.8V : Nominal voltage of 14.4V , reaching 16.8V fully charged.
- 18V / 20V / 21V : Nominal voltage of 18V , with a maximum of 21V .
- 36V / 40V / 42V : Nominal voltage of 36V , reaching 42V when fully charged.
Its Capacity and Importance
- The capacity of a battery, measured in Ah (ampere-hours), indicates how much energy it can provide in a certain time interval. It is more difficult to measure directly and can be estimated by checking the specifications of the cells inside the battery.
- An indication of capacity can be given by the weight of the battery, as higher capacity batteries have more cells or better performing cells.
Types of Cells and Their Capacities
- Tool batteries mainly use two types of cells: 18650 and 21700 .
- 18650 cells :
- Capacity: 1.3Ah to 3.5Ah
- Dimensions: 18 x 65 mm
- Weight: 40-50g , depending on capacity (higher capacity cells tend to be heavier).
- Cells 21700 :
- Capacity: 3Ah to 5Ah
- Dimensions: 21 x 70 mm
- Weight: 66-78g , depending on capacity ( 5Ah cells are heavier).
How Tension Forms
- The voltage of a battery is obtained by connecting the 3.7V cells in series:
- 3 cells for 10.8V / 12V .
- 4 cells for 14.4V / 16.8V .
- 5 cells for 18V / 20V / 21V .
- 10 cells for 36V / 40V / 42V .
- In these configurations, the capacity remains the same as the capacity of a single cell. For example, if we use 3Ah cells, the assembly will have a total capacity of 3Ah .
Increasing Capacity by Connecting in Parallel
- To increase capacity, cells can be linked in parallel, which means adding more rows of cells:
- 2 or 3 rows of cells in parallel to double or triple the total capacity.
- Thus, cells with lower capacities can be used to achieve the desired voltage and increase the capacity.
Identification and Warnings
- To identify the actual battery capacity, open the case and check the cell type. Each cell is marked with the type (for example, 18650 or 21700 ) and its capacity, which can vary from 1.3Ah to 5Ah .
- Beware of prices that are too low, which may indicate the use of lower-quality or lower-performing cells.
In conclusion
- The voltage is checked with a multimeter to ensure compatibility with the tool.
- Capacity is estimated by checking internal cells and battery weight.
- Choose batteries with quality cells to achieve optimal performance and durability in use.
Thus, we can conclude the following:
- Accumulator with 5 cells in a row :
- Minimum capacity : 1.3Ah (affordable)
- Maximum capacity : 5Ah (customized prices)
- Maximum voltage : 21V (with 5 cells in series)
- Accumulator with 10 cells :
- Cell configuration : Can be configured in 2 main ways:
- 5S2P (5 cells in series and 2 rows in parallel) :
- Voltage : 21V (nominal)
- Minimum capacity : 2.6Ah (if each cell has 1.3Ah)
- Maximum capacity : 10Ah (if each cell has 5Ah)
- 10S1P (10 cells in series) :
- Voltage : 42V (also marketed as 40V)
- Capacity : 1.3Ah to 5Ah
- Accumulator with 15 cells :
- Cell configuration :
- 5S3P (5 cells in series and 3 rows in parallel) :
- Voltage : 21V (nominal)
- Minimum capacity : 3.9Ah (if each cell has 1.3Ah)
- Maximum capacity : 15Ah (if each cell has 5Ah)
Remarks:
- The price of a battery increases with the capacity and complexity of the cell configuration.
- A 10 or 15 cell battery can be configured to provide both higher voltages (42V) and higher capacities (by parallel connection).
- The choice between voltage and capacitance depends on the specific application and the needs of the tool you are using.
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