coin battery dat

CR2030 provides up to 3V 210~225 mAh, and CR1220 provides up to 3V 38mAh power.

Both button cells provide very low discharge rate that can work for 1-3 years.

safest battery - Lithium Iron Phosphate (LiFePO4)

The safest batteries to use, especially in terms of preventing fires or explosions, are Lithium Iron Phosphate (LiFePO4) batteries. They are known for their thermal and chemical stability compared to other lithium-ion batteries. Here are some key points about them:

Safety: LiFePO4 batteries are less likely to overheat, catch fire, or explode because of their higher thermal runaway threshold. They also have better stability during overcharging and short-circuit conditions. Longer lifespan: These batteries tend to last longer than other types, reducing the need for frequent replacements. Stable chemistry: Their chemical structure is more resistant to thermal changes, which makes them safer even in extreme conditions.

  • LiFePO4 - https://www.youtube.com/watch?v=07BS6QY3wI8&ab_channel=HighTechLab

Power battery

compare

Battery Type Size Voltage Capacity Current Capability Typical Use Features
AA Alkaline 14.5 x 50.5 mm 1.5V 2000-3000 mAh Up to 700-1000 mA Medium to high power devices High capacity, suitable for long runtime
CR2032 20 x 3.2 mm 3V 200 mAh ~0.2-3 mA (sustained), up to 10 mA (peak) Low-power devices Compact, suitable for low-power applications
CR2025 20 x 2.5 mm 3V 150 mAh ~0.2-2 mA (sustained), up to 10 mA (peak) Low-power devices Slightly lower capacity than CR2032
LR44 11.6 x 5.4 mm 1.5V 110-130 mAh ~1-10 mA (sustained) Small low-power devices Small size, lower voltage, and capacity
CR1220 12 x 2.0 mm 3V 35-40 mAh ~0.1-1 mA (sustained), up to 5 mA (peak) Small electronics, key fobs Very small and thin for low-power devices
CR1632 16 x 3.2 mm 3V 120 mAh ~0.2-2 mA (sustained), up to 10 mA (peak) Watches, calculators Slightly thicker, offers more capacity
SR621SW 6.8 x 2.1 mm 1.55V 17-20 mAh ~0.1-1 mA Watches, small calculators Stable voltage, long-lasting in low-drain devices
LR927 9.5 x 2.7 mm 1.5V 30-45 mAh ~0.5-3 mA Laser pointers, small toys Small, used in low-power gadgets

AA vs. AAA

Feature AA Battery AAA Battery
Size 14.5 mm (diameter) x 50.5 mm (length) 10.5 mm (diameter) x 44.5 mm (length)
Voltage 1.5V (Alkaline) / 1.2V (Rechargeable NiMH) 1.5V (Alkaline) / 1.2V (Rechargeable NiMH)
Capacity 2000-3000 mAh (Alkaline) 600-1200 mAh (Alkaline)
Current Capability 700-1000 mA sustained 300-500 mA sustained
Typical Use Medium to high-power devices: flashlights, toys, wireless mice, clocks Low-power devices: remote controls, small toys, wireless keyboards
Weight Approx. 23 g (Alkaline) Approx. 11.5 g (Alkaline)
Cost Generally slightly more expensive per battery Slightly less expensive per battery
Energy Density Higher capacity and energy per unit Lower capacity due to smaller size
Runtime Longer due to higher capacity Shorter due to lower capacity
Features Ideal for devices that require more power and have higher current demands Ideal for smaller devices that require less power and a more compact size

Key Differences:

Size: AA batteries are larger than AAA batteries, both in diameter and length. This difference in size translates to a larger energy storage capacity for AA batteries.

Capacity: AA batteries typically have 2-3 times the capacity of AAA batteries. This means AA batteries will last longer in devices that use the same amount of power.

Current Capability: AA batteries can deliver higher currents (700-1000 mA), making them better suited for devices that need more power, such as flashlights, toys, and certain electronics. AAA batteries, due to their smaller size, typically provide lower current (300-500 mA), which is suitable for low-power devices like remote controls and wireless keyboards.

Weight: AA batteries are about twice as heavy as AAA batteries due to their larger size and greater energy storage.

Usage: Devices that require more energy or have higher power consumption tend to use AA batteries, while devices that prioritize size and weight, like remotes and small electronics, often use AAA batteries.

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