Aukey SoundTank Bluetooth Speaker | $21 | Amazon | Promo code KINJA2AK
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If you demand a lot out of your Bluetooth speakers, this discounted Aukey SoundTank might be just what you’re looking for.

Very few Bluetooth speakers can run for 30 hours on a charge, nevermind ones that cost $21. This model is also splash-proof, and features dual 5W drivers, meaning it should be loud enough for most occasions indoors or out. Just be sure to use promo code KINJA2AK at checkout to save a whopping $25.