Yes, it is safe to charge an e-bike battery at home if you take a few precautions. It is important never to leave the battery unattended. Use a fireproof surface and keep it away from flammable materials.
The VLITEX e-bike battery bag or a VLITEX fire blanket offer additional protection. Both are made of silicone-coated fiberglass fabric that can withstand temperatures of up to 1,000 °C for short periods.
When charging, make sure that the temperature does not get too high. A defect is often indicated by unusual heat.