Clean modern 3D render illustration, soft white and light blue background, warm accent lighting in orange and yellow tones, minimalist style, professional product visualization, shallow depth of field, studio lighting, positive and friendly mood. 18650 lithium battery cell with visible charge level indicator showing gradual decline, small clock next to it showing time passing, subtle graph going down in background, no text, no letters, no labels, no words, no typography --ar 16:9