Tonight, Saturday 10pm EDT I’m helping Ladyada with her weekly “Ask an engineer” live video chat, it’s going to be a great show – all about batteries, solar, power & more. If you have questions about her article in MAKE (On Batteries, How to decide which batteries will run your project best. – From the column DIY: Workshop. MAKE 11 page 151.) or questions about the online version stop in and ask! Details here.