A Power Bank can be said to be a portable battery that uses circuitry to control any power in and power out. They can be charged up using a USB charger when power is available, and then used to charge battery-powered items like mobile phones and other devices that would normally use a USB charger.

Power banks work by use of sophisticated electronics to manage taking in charge from a charger and storing it in a battery and then charge other devices. A power bank is not just a simple battery, they use sophisticated electronic circuitry to manage being charged and then charge other devices.

Types of Power Bank

We have two types of power banks which are standard and solar power banks

• The Universal or standard power bank: These power banks are the normal power bank portable chargers that are available in the stores and online. They are charged from the normal USB chargers.
• The Solar power bank: As the name implies, Solar power banks can use sunlight to charge up. They have photovoltaic panels. Solar power banks are really only able to trickle-charge the internal battery when placed in sunlight because the solar cells are relatively small, but this can be a very useful function.

How long a Power Bank can last

There are two main types of a lifetime that are associated with power banks which are

• The Charge discharge cycles: All rechargeable batteries will gradually wear out. Normally the lifetime of batteries is quoted in terms of the number of charge-discharge cycles they can undergo before their performance falls by a given degree. However, Some cheaper power banks may only have a life of 500+ charge-discharge cycles, but good power banks will have lifetimes of more charge-discharge cycles.
• The Self-discharge time: All batteries cell, either rechargeable or primary, have a certain level of self-discharge. For rechargeable batteries with their own control circuitry, a small amount of power is needed to keep these circuits alive. As a result, there is only a definite time that a battery will remain charged.
  Good power banks can hold a charge for up to 5 months with only a small loss of charge, but low-quality power banks may only retain its charge for about a month.

7 Best Power Banks with Solar Charger

• BEARTWO 10000mAh Solar Power Bank
• Hiluckey 24000mAh
• ZeroLemon 26800mAh
• Nektech 10000mAh
• Soluser 25000mAh
• Hobest 10000mAh
• OUTXE 20000mAh

BEARTWO 10000mAh

features

• Waterproof USB ports
• Built-in LED lights
• Smart IC technology integrated

Specification

• 10000mAh battery capacity
• 4-5 hours to get charged
• Weighs 7.4 oz

Hiluckey 24000mAh

Features

• Fully waterproof USB ports
• Overcurrent, overvoltage and short circuit protection
• Ability to charge your iPhone 8-10 times

Specification

• 24000mAh battery capacity
• Dimensions: 6.1 * 3.3 *1.18 inches
• Solar power output: 3.75W

ZeroLemon 26800mAh

Features

• Hook included
• Quick Charge 3.0 port and 5V/2A micro USB port
• Multi-functional LED light

Specification

• Battery capacity 26800mAh/97.28 Wh.
• Weight: 19.86 ounces
• Dimensions: 6.93 *3.26 *1.30 inches

Nektech 10000mAh

Features

• Anti-explosion warranty
• Waterproof solar power bank
• LED lights included

Specification

• 10000mAh battery capacity
• Lasts over 1000 recharge cycles
• 21-24% solar panel efficiency

Soluser 25000mAh

Features

• 4 LED indicator
• Electrical protection for loads
• Dual USB ports at 2.1A

Specification

• 25000mAh battery capacity
• weighs 478g
• Dimensions: 195 x 102 x 35 mm

Hobest 10000mAh Solar Power bank

Features

• Compass whistle included
• LED light integrated into the solar power bank
• Two charging methods

Specification

• 10000mAh capacity
• weighs 7.4 oz
• Dimensions: 5.51 x 2.95 x 0.7 inches

OUTXE 20000mAh

Features

• Sun power solar panels
• 4A dual USB ports
• Quick charge integrated

Specifications

• IP67 Protection
• Maximum charge at 8W
• 20000mAh battery capacity

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