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It depends on several key factors including how often you need to recharge your phone, your phones battery capacity, and how long you are normally away from power for.

For example, if you have a small smartphone with a 2,000mAh power bank and recharge it on average once per day, then a 10,000mAh power bank will give you just over 3-days of power without needing to charge the power bank. If you have a large 4,000mAh power bank, you would get less than 2 charges from the 10,000mAh power bank. 

A 16,000mAh power bank is very popular. Visit this site here for a more comprehensive guide on what to know before you buy a power bank: Visit Best Buy Site

Most power banks have a lithium battery that has a useful life equivalent to approximately 500 cycles of the battery, from flat to full. This number of charges of the power banks battery equates to several thousand full phone charges during the life of the power bank. For instance, most people will get over 5-years of service from a good quality power bank. Of course, the more durable and better constructed a power bank is, the longer it will last for, having rubber seals on the power bank outputs helps to protect from dust and moisture. To help your power bank last for longer, keep it stored somewhere dry and room temperature when not in use. Also, if storing a power bank for an extended amount of time, it is best to leave it at approx. 50% charged.

Yes, because the solar panel gives a back-up way to get some power when all else fails. However, a solar power bank only has a very small solar panel which means it is very slow to recharge itself in solar. The best way is to have an additional mobile solar charger to plug into the power bank to store up much more solar power. Nevertheless, a small solar panel is always better than no solar panel at all. Of course, all SunSaver power banks can be recharged also using any USB power source that you use to charge your phone.

It will depend on the power bank battery capacity and the power rating of the USB power source. A 10,000mAh power bank can typically be recharged in around 4-hours, whereas a 24,000mAh power bank will take 8-hours to full recharge from a 3-Amp power source. If charging the power bank from a portable solar charger, then the time will depend on the solar charger power rating and the strength of the sunlight. Using just the small solar panel on the front of a solar power bank will take multiple days to store enough power to provide a full phone charge. If you think your power bank is taking too long to recharge, you can trouble shoot it using our article: Why is my power bank taking so long to charge?

Power banks have a 5-Volt USB output which are compatible with most USB powered devices, including:

• Smartphones, inculding Apple iPhone and Android
• Tablets, including Apple iPad and Android
• Ereaders
• Speakers and headphones
• Portable gaming consoles
• Torches and headlamps
• Hearing aids and other medical devices
• Handheld GPS
• Mobile EFTPOS terminals
• Action cameras
• Smart watches

Essentially, if the device has a USB input, it can be recharged with a power bank!