Hi Lucinda,

Thank you for reaching out about this issue. Have you tried to move your lanterns into a different location that gets more sun? We recommend having the solar units face directly towards the sun in order for the solar panel to recieve the best charge. I have my personal lanterns at home in a tree with no leaves and it seems they are getting enough sun to fully charge the battery and cast a strong glow at night so it makes me wonder if your lanterns arent charging adequately due to the location they were placed.

To answer your question about a battery charger, yes and no. Since our lanterns use rechargeable batteries, techniquely you could charge the batteries in a battery charger, HOWEVER that would require you to take out the batteries from the solar unit every time you want to do that.

I would first recommend moving your lanterns to a place that is getting more sun and if that doesnt work, depending on how long you have had your lanterns for, I would look into either new batteries and/or new solar units. We can help you with trouble shooting/ replacement parts via our customer service line (800-426-4303) or email (info@allsop.com).

Best,

Jessie