Replacement Battery, AG3 / LR41 View Larger Image - Replacement Battery SKU: BATT-B-AG3 Availability: Out of stock Price: $0.49 You will be notified as soon as this product becomes available. Product is out of stock. Sign up for Email notification once this product becomes available: Button cell replacement batteries (AG3 / LR41). Battery brand may vary depending upon availability. See our other batteries.