FNB-110LI Lithium‑Ion battery for use with the HX290 and other compatible devices. This STANDARD HORIZON FNB-110LI battery pack provides 2300 mAh capacity in a lightweight design. ProductDatabase notes: "FNB-110LI Lithium-Ion battery for use with the HX290, Type: Batteries." Rainforest marketing highlights compact dimensions (2.9 x 0.9 x 1.9 inches), item weight 4.8 ounces, and recommended use for radios. Includes one lithium-ion battery. Country of origin indicated as USA. Proposition 65 Warning: True.