Aptoyu via Amazon offers its Aptoyu 10-watt Portable Bluetooth Speaker for $16.99. Coupon code "286WBL5U" cuts it to $9.99. Plus, Prime members bag free shipping. That's the best deal today by $10 and tied with our February mention as the lowest price we've seen. Deal ends May 10. Features include two 5-watt drivers, a microSD card slot, and rechargeable battery with up to 24 hours of music per charge.