In need of a portable battery? These phone chargers will keep your smartphone fully charged all day long. Our list includes phone chargers that will work for iOS devices, Android phones, and even BlackBerry or Windows phones. We’ll be focusing on chargers that charge via MicroUSB cable, Lightning cables, or both. Some of these chargers are completely self-contained, while other external battery packs featured here require you to carry a charging cable. These are five of the very best phone chargers you can buy for today’s smartphones. Whether you need a portable battery to keep your work phone charged, a travel charger to get you through those long flights, or just a backup battery to keep in your car in case of emergencies, one of these phone chargers is going to be perfect for your unique needs.

1. Skiva PowerVault Lightning External Battery Pack

This is a portable, self-contained charger for your smartphone or tablet, and it will work with both Android and newer Apple devices. This battery pack contains a 2600 mAh battery, which means it can fully recharge a new iPhone 6 and still have a bit of charge left over. I used this power pack on two recent trips, and it was more than equal to the task of charging my iPhone 6. I didn’t even need to bring a backup charger. It’s Apple MFi Certified as well, which will give Apple users a bit more peace of mind.

This is a solid option for iPhone or iPad owners who have a device with the newer Lightning connector. One end of this charger has a Lightning connector, and the other end has a micro USB connector. To recharge, just stick this external battery into any device with a USB port, or into any USB-compatible wall charger. Recharging a totally empty battery takes about two or three hours, at least in my experience.

The only thing I dislike about this charger is how fat it is. It fits great in a bag or pocket, but it can be hard to have it plugged into my laptop USB slot on a flat surface, because the charger is thicker than the laptop itself. This was a problem on my older Mac laptop, but it’s an even more annoying problem now that I have an even skinner MacBook. I mostly find myself charging this device from a USB wall adapter.

Still, if you don’t want to have to lug around extra cords or charging cables, this completely self-contained unit is an awesome option to consider. I specifically bought this phone charger because I wanted something with no additional cord I had to carry around. It’s also a nice accessory for business, since it will charge multiple types of devices.

Price: $39.99 (50 percent off)

Pros:

• Compact (about the size of two lipstick tubes)
• Will charge both Lightning and microUSB devices
• Fully recharges in a couple of hours
• Works on a wide range of devices, including Samsung Galaxy S5, S4, S3, Note 3, Note 2, Note, Nexus 4, 5, 7, 10, Moto X, G, HTC One(M8), LG G3, G2, Optimus, Xperia Z2
• Will fully recharge many smartphones

Cons:

• Not as thin as other options out there
• Charges devices somewhat slowly
• Only under warranty for one year
• Some users may require a charger with a bigger battery, particularly if they want to recharge both tablets and phones
• Limited color options

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2. PNY T2200 PowerPack

This 2200mAh charger from PNY has a lot going for it. It’s stiletto-thin, and that makes it easy to carry. While some users have reported slow or paused charging, this appears to be an issue with a limited number of defective devices, rather than a problem that affects all chargers. You can buy this accessory with confidence, and return it if you happen to get one of the bad ones. However, the newer PowerPacks are unlikely to give you any trouble

Users say this charger will hold its charge for quite some time, so you won’t need to do “top-up charges” just to keep this device ready for when you need it. It will fit easily in a bag, purse, or pocket. Unfortunately, it only has a single port for output, so you can only charge one device at a time with this portable battery pack. Still, that is sufficient for most people.

Price: $7.99 (47 percent off)

Pros:

• Under warranty for three years
• Universal
• Slim design
• Comes with Micro-USB cable for recharging
• More than enough juice to recharge iPhones once (but not all Android devices, which generally have bigger batteries)

Cons:

• Does require cords
• Not waterproof
• Not up to the task of charging a tablet
• 2200mAh is a little on the small side
• Can’t easily be attached to a key ring or caribiner

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3. Intocircuit 2nd Gen Power Castle 15000mAh With SmartID Technology

Looking for a charger that’s beefy and rugged? This portable battery’s best feature is its 2.1A smart USB port. This smart charger can identify a specific device, and offer you maximum charging efficiency and speed. This massive battery will charge an iPhone 5s at least six times, a Galaxy S5 more than four times, or an iPad Air once.