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Solar Powered Review - The Nature N3rd

Posted: 11/24/2014 2:33:23 PM by

Gear Reviews – EnerPlex Jumpr Stack 3 and Jumpr Stack 6


I know I’ve mentioned this a lot, but I cannot stress how important it is to have spare power in a survival situation.

Whereas it is important to not rely on technology, today’s technology make getting through a survival situation so much safer.

Your smartphone has so many ways to help you though a survival situation, it’s worth taking it with you. Even if you don’t have a cell signal (for instance, lost in the wilderness) your cell phone can be a source of light, a rescue signal, a compass, a map, etc, etc.

The only absolute requirement is a power source.

We all know that even with increases in rechargeable battery technology, cell phones will drain that battery in a day.

That is why you need to carry a battery pack in your survival gear (along with your solar panels reviewed here).

EnerPlex sent over two of their Jumpr Stack battery packs, the Jumpr Stack 3 and the Jumpr Stack 6 for me to review.

The Jumpr Stack series are extremely well thought out battery packs.

The case is a hard shell plastic. It feels durable, like it’s not going to break with normal use. You’re really going to have to go out of your way to break this thing.

There are safety orange highlights on it. Which will make it much easier to find in low light or if dropped in high grass.

The best part about the case is the built in flex cables. Right there on the battery pack is a micro-USB and Lightning cable connector. This eliminates the need to carry extra cables in your survival pack.

Aside from built in cables, there is a standard USB output port in case your device doesn’t take Micro-USB or Lightning connectors.

The recharge port is a micro-USB input slot.

The Jumpr Stacks also have a battery meter and an on/off switch. Makes it easy to do power management.

The best feature of the Jumpr Stack series is the stacking ability. Each Jumpr Stack has a magnetic plate integrated onto the front and back of the pack. This allows the battery packs to snap together and stack. Each battery case has an indention on one side and the bump on the other side. You just match up the bump to the indention and the magnets will take it from there. In each bump/indention there are (respectively) either contacts or pins. The contacts/pins allow the Jumpr Stack batteries to daisy chain their power.

There is really no limit to how many Jumpr Stacks batteries you can stack.

Battery Centipede - Image courtesy of

The Jumpr Stack 3 has a 3200 mAh battery; the Jumpr Stack 6 has a 6200 mAh battery; stacked together, they make a 9400 mAh battery. To put that into perspective, the new iPhone 6 Plus has a 2915 mAh battery. That means my stack can do over three full recharges before I need to recharge those batteries.

In testing, each battery performed the same, with the only difference between the two models was the size of the case and the battery capacity.

Each battery was able to output 5.18 V consistently. On charge, the maximum I was able to draw was 1.1 A. This is actually a little better than the specification listed (5v/1A).

The Lightning connector is Apple certified and should work on all the latest iOS devices. Apple is very picky about who can make third party connectors and EnerPlex did their homework.

The only downside I see are the exposed pins. If those pins get broken, then it’ll break the stacking ability. Although, the design team at EnerPlex thought to set the pins on the indention side, which should minimize exposure. Also, if if the pins get damaged, these batteries are still functional. You just lose the stack capability.

The EnerPlex Jumpr Stack 3 and 6 are getting a permanent placement in my bug-out-bag. Having power in a survival situation is a must now a days, and these battery packs make it easy to have the power always available.


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