Li-ion Battery Tips
-
How Long Does It Take to Charge an 18650 Battery
How Long Does It Take to Charge an 18650 Battery? Charging time for an 18650 battery depends on its capacity, the charger’s current, the cell’s starting state of charge, and the charging profile. A 2,500 mAh cell and a 3,500 mAh cell will not necessarily finish charging at the sam...Read more -
LIR2450 vs LIR2032: Size, Capacity and Applications
LIR2450 vs LIR2032: Size, Capacity and Applications LIR2450 and LIR2032 are rechargeable lithium-ion coin cells with a similar nominal voltage, but they are designed for different space, runtime and load requirements. The larger LIR2450 typically offers substantially more capacity and current...Read more -
18650 vs 32650 Battery: Size, Energy and Cell Selection
18650 vs 32650 Battery: Size, Energy and Cell Selection Choosing between an 18650 and a 32650 battery is not simply a matter of selecting the larger cell. The two cylindrical formats have different diameter requirements, packaging implications and potential energy capacities. For OEM product d...Read more -
14500 vs 16340 Battery: Size, Capacity & Compatibility
14500 vs 16340 Battery: Size, Capacity, Voltage and Compatibility Choosing between a 14500 and a 16340 battery involves more than comparing capacity. Both formats are used for rechargeable cylindrical lithium-ion cells, and both have 3.7V nominal-voltage options. However, the 16340 is wider an...Read more -
18650 vs 18350 Battery: Size, Capacity and Uses
18650 vs 18350 Battery: Size, Capacity and Uses The 18650 and 18350 are both cylindrical rechargeable battery formats with a nominal diameter of about 18 mm. The crucial difference is length: an 18650 is approximately 65 mm long, while an 18350 is approximately 35 mm long. That dimensional dif...Read more -
21700 Battery Pack Design for Portable Test Equipment
21700 Battery Pack Design for Portable Test Equipment Portable test equipment asks more of a battery than long runtime. A field oscilloscope, data logger, calibrator, cable tester or portable analyzer may combine sensitive analog measurement circuits with processors, displays, communications, ...Read more -
18650 vs 21700 Battery Packs: Cost per Wh for OEMs
18650 vs 21700 Battery Packs: Cost per Wh for OEMs A 21700 cell normally costs more per unit than an 18650 cell, but that does not automatically make a 21700 battery pack more expensive per watt-hour. A larger cell may reach the required energy with fewer cells, welds, holders and assembly ope...Read more -
How to Validate Spot Weld Quality in 18650 and 21700 Battery Packs
How to Validate Spot Weld Quality in 18650 and 21700 Battery Packs A spot weld can look clean and still have insufficient fusion, unstable electrical resistance or poor mechanical strength. It can also be too aggressive, damaging the nickel strip or the cell terminal. For 18650 and 21700 batte...Read more -
21700 Battery Charger Guide: How to Match Voltage, Current and Cell Configuration
21700 Battery Charger Guide: How to Match Voltage, Current and Cell Configuration Selecting a 21700 battery charger is not simply a matter of finding a charger labeled “for lithium batteries.” The charger must match the cell chemistry, number of cells connected in series, permitted charging cu...Read more -
Nickel Strip vs Copper Busbar for 18650 and 21700 Battery Packs
Nickel Strip vs Copper Busbar for 18650 and 21700 Battery Packs Selecting an 18650 or 21700 cell is only one part of battery pack engineering. The conductor connecting those cells can also limit pack current, increase voltage drop and create unwanted heat. A high-performance cell cannot delive...Read more -
21700 vs 26650 Battery: Size, Capacity, Discharge Rate and Pack Design Compared
21700 vs 26650 Battery: Size, Capacity, Discharge Rate and Pack Design Compared Choosing between a 21700 and a 26650 battery is not simply a matter of selecting the larger cell. Although the 26650 has a wider cylindrical body, a modern 21700 cell may offer comparable capacity, competitive disc...Read more -
18650 Discharge Current: Low Drain vs High Drain
18650 Discharge Current: Low Drain vs High Drain Choosing an 18650 battery by capacity alone can create two opposite problems: a low-current device may carry unnecessary cost and lose runtime, while a high-current device may suffer voltage drop, overheating, early cutoff, or unstable perform...Read more
