Honolulu's fire department is pushing lithium-ion battery safety this month, a warning aimed at anyone who charges phones, e-bikes, or scooters at home.

• Lithium-ion batteries can overheat, catch fire, and spread flames fast.
• Bad charging habits are the main risk, and most of them are easy to fix.
• The advice: use only the charger that came with the device, and charge on a hard, flat surface.
• Fire crews are framing battery safety as a shared job for every household, not just a department problem.

Outlook: Expect more battery safety messaging through Fire Prevention Month as these devices keep spreading into more homes.