Your Invacare Nutron R51 14" seat wheelchair requires 2 replacement 12V 35AH batteries with NB terminals.
The Invacare Nutron R51 replacement battery has high performance, high discharge design, wide operating temperature range, and long expected service life. The replacement battery meets or exceeds the original manufacturer specifications and ensures your satisfaction regarding quality, durability, and performance.
You have to install the new Invacare Nutron R51 replacement battery set in your wheelchair in the same original configuration and reuse the existing cables. Please check your existing battery for dimensions prior to ordering as manufacturers may change requirements without notice.