# 3.7v solar battery

## How long do 3.7 V batteries last?

Now a fully charged 1000mAH battery will last approximately 1000mAH/Load current hours. So if the load is 50mA, the battery would last about 1000/50= about 20 hours if fully charged but that is only an approximation.

## What’s the best 3.7 V battery?

Top 10 Best 18650 Battery For The Money Reviews

• 4 Samsung INR18650-25R 18650 2500mAh 3.7v. …
• 5 EBL 18650 Battery 3.7V 3000mAh. …
• 6 On the Way 18650 3.7V 5000mah. …
• 7 ATK 18650 Battery 3.7V 3400mAh. …
• 8 MXJO 18650 2500mAh 35A. …
• 9 Odec 18650 Battery, 3.7V 3350mAh. …
• 10 LG HG2 18650 3.7v 3000mAh 20A High Drain Flat Top.

## What are 3.7 V batteries used for?

18650 3.7 Volt lithium-ion rechargeable batteries are cylindrical batteries used in mainly for laptop battery packs, telephones, electronic cigarettes, flashlights and cordless power tools.

## Can I use a 3.7 V battery instead of 3.6 V?

There is NO difference between 3.6 and 3.7 volt cells. It is simply a NOMINAL voltage, because every cell needs a reference point. In fact, either 3.6 or 3.7 volt cells have a fairly wide range.

## Can I use AA batteries instead of 18650?

In brief: No, the 18650 cells can not be used in place of standard AA batteries, rechargeable or otherwise: The nominal voltage of the 18650 is significantly different from the 1.5×3=4.5V of the three AA cells, assuming those are connected in series.27 мая 2014 г.

## Are all 18650 batteries 3.7 V?

An 18650 is a lithium ion rechargeable battery. … The 18650 cell has voltage of 3.7v and has between 1800mAh and 3500mAh (mili-amp-hours). There are two types; protected and unprotected. We absolutely recommend protected 18650 batteries.

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## How do I know if my battery is 18650?

The way to identify them is the G-number. On the second line, the first number after the G is the capacity identifier. As you can see, the 2000mAh cell is marked with G5, the 2400 one with G7 and the 2600 one with G8. That’s how to tell them apart.

## What voltage should I charge my 3.7 V battery?

Lithium-ionNominal cell voltageTypical end-of-dischargeMax charge voltage3.6V2.8–3.0V4.2V3.7V2.8–3.0V4.2V3.8V2.8–3.0V4.35V3.85V2.8–3.0V4.4V9 мая 2017 г.

## Can I use a 5v charger with a 3.7 V battery?

The 5v ‘charger’ is actually just a 5v DC power source. … A battery needs a higher voltage power source than the current battery voltage in order to recharge. To fully recharge a lithium ion cell, you need to eventually get to 4.2v. If the system only used 3.7v, it would never (fully) recharge.

## How do I know if my lithium ion battery is bad?

The most easier way how to find whether lithium battery is not good, is charge it to full SoC (near 100%) and then measure voltage drop when discharge.

1. check the voltage now. If it is above or below the normal limits, it could be bad. …
2. Charge the battery in a good charger. …
3. Afte.

## How many cells are in a 3.7 V lithium ion battery?

By using the cells in series, a battery pack can have any voltage possible in 3.7 volt steps. Ex. Lithium-Ion batteries use 3 cells to provide an 11.1 volt battery, 4 cells to provide a 14.8 volts battery or 10 cells to provide 37 volts battery.