KMASHI’s cheap battery packs are some of the most popular items we’ve ever posted, and their well-reviewed 10,000mAh model is back down to just $9 today (with code MHLSNM2R), matching all-time low.

This battery is just about the perfect size for sharing with a travel partner during an extended flight, or keeping in your bag if you’ll be spending a long time away from power outlets, but its biggest selling point is peace of mind; life is just less stressful when you know that your phone won’t run out of juice. So if you don’t own something similar already, it’s a no-brainer deal. [KMASHI 10000mAh Dual USB Battery Pack, $9 with code MHLSNM2R]

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