Polycom / SpectraLink 8400 Phones: Replacement Battery. 1200 mAh
- Check out the extended capacity battery for an even longer lasting battery. http://www.amazon.com/gp/product/B00FQJP2BM
- Fully replaces battery number 1520-37214-001 and RS657.
- Lithium Ion Rechargeable Battery Pack | 3.7 Volt | 1200 mAh | Cells Made in Japan
- Manufactured by Artisan Power, a leader in premium quality replacement battery packs.
- Polycom/SpectraLink 8400, 8440, 8450, and 8452 Replacement Battery.