【About Packages】 1 pc x pmnn4409/pmnn4491 battery and 1 pc belt clip are included in the package. | 【Compatible Model 】 for xpr3300 xpr3300e xpr3500 xpr3500e xpr7350 xpr7380 xpr7550 xpr7550e xpr7580 xpr7580e apx900 apx1000 apx2000 apx3000 apx4000 pmnn4409 pmnn4491 battery (with impres function)(Please contact us if you are not sure about your radio model number, we will help you out) | 【Durable & Safety & Reliable】 Upgraded pmnn4491 rechargeable battery is the same size and thickness as your original pmnn4491 battery. Our pmnn4491 battery is with impres function and manufactured with premium grade A++ battery cells, high quality Aluminum Casing and high quality Smart IC chip.It is tested under strict QC standards step by step to ensure it lasts over 800+ charge cycles. built-in microchip to prevent over-charging, over-discharging, short-circuiting, and over-heating. | 【About Customer Service】 Please feel free to contact us at any time if you have any questions or any issues with our products or delivery. Our professional technical team and customer service promise you a satisfactory resolution within 24 hours. We take care of all quality-related issues with a REPLACEMENT or REFUND. | 【Important Attention】 Please use a impres charger to charge your impres battery, a Impres battery is not able to charge with a non-impres function chager. Our pmnn4491 battery may be sent out with little power or no power. Please make sure it is fully charged first if the radio cannot turn on. It is recommended to fully drain and fully charge the pmnn4491 battery, especially during the first 3 charging and discharging cycles. Doing so may greatly improve the overall life of the pmnn4491 battery.