Replacement battery fits 5 Gibson compatible models. Specifications: 340 mAh, 3.7V, Li-ion. Compatible with: G-FORCE Auto-Tuner, GForce, Min-ETune-System Automatic Tuning System, Tronicaltune, minEtune. Replaces: Gibson GBP 452050. Gibson replacement battery. Simple plug-and-play replacement requiring no modification.