Shimano
Di2 SM-BTR1A Universal Battery

Backorder: This item is currently not in stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

The life-force of Shimano's advanced Dura-Ace Di2 and Ultegra Di2 components systems.

The SM-BTR1 is a rechargeable 7.4 volt lithium-ion battery which powers the digital shifting components. Shimano recommends recharging every 1,000 miles, but it's safe to charge at any interval. The battery charges in 1.5 hours, and if it does die while riding, the system will stay in the gear the last used gear, so you won't end up on foot.

The SM-BTR1 weighs 70 grams. Its required charger, wiring kit, and frame mounts are sold separately.

Additional Details:

• Lasts 300 charge cycles without diminishing, then slowly diminishes thereafter
• Charge time: 1.5 hours
• Battery weight: 70g.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

The product weight specified is an approximate weight based on the manufacturer's specifications (if available) or our measurement of one or two examples. For most products, the weight will typically vary by 5% to 10%.