slim size for travel and keeps charge for 3 months

My condo recently was without electricity for almost 48 hours as was my entire neighborhood. I couldn't even get my car out of the garage because of the electric garage door opener so that was not an option for charging my phone. I vowed never to get caught with very little power left on my smart phone so as soon as the power came back on I ordered the power pack to keep on hand for just this type of incident as well as for travel. I haven't had it for very long so am hoping the instructions are correct and the power pack only needs to be charged every 3 months.

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