Are you going on a trip soon and need some extra power to both your phone and your tunes? Then make a pit stop at Amazon first. Today the ubiquitous retailer is offering a discounted combo to US customers: a "ruggedized" and semi-waterproof Omaker M4 Bluetooth speaker plus a 5200mAh Omaker external battery for $31.98. That's $20 off of the retail price for both of them combined - you're basically getting the charger for free, and the speaker at a tiny discount.
To get the discount add both items to your cart. Make sure that you select the orange version of the speaker and the slightly cheaper black version of the charger, not the black + grey or black + yellow one. Before paying, apply the coupon "OMAKER11" in the discount field. You'll see the discount applied, bringing the total down to $31.98. If you happen to be an Amazon Prime subscriber, you'll get free two-day shipping for both of them.
To be honest, neither the speaker nor the charger is especially noteworthy on its own, but getting both for a little under $16 is great for these basic tools. Omaker claims 12 hours of music from the M4 speaker, and the relatively small charger has a built-in LED flashlight.