Standard Horizon Alkaline Battery Tray for HX870/890 Standard Horizon Alkaline Battery Tray for HX870/890 The Standard Horizon SBT-13 Alkaline Battery Tray allows you to use AAA batteries in your HX870 and HX890 VHF Radio. SKUSTXSBT13 MAN#SBT-13 ID#: 4661 Our Price: $22.95 Availability: In Stock Condition: Brand New Add to cart We’re sorry for the inconvenience, but please know we are working hard to replenish stock and fill backorders. Global shipping constraints and other material shortages have slowed the supply of products in many industries, including GPS and Marine electronics. We update the Estimated Shipping Date on our website in real time, so feel free to check back frequently. Thank You for your patience and for shopping with The GPS Store, Inc.