Hello from a commuter in Manila, Philippines,

I was hoping I could find opinion on overvolting my 20w 12v MR-11 homemade light.

I have now gone back to using my old 12v 5Ah lead acid since my 4Ah NiMH pack died last month. I found out that only one cell was shorted, the rest are still healthy. While Im still finding time to rebuild the NiMH pack I thought of using 2 of the NiMH cells in series with the lead acid to overvolt by 20%. Actually Ive tried it but only for a few seconds fearing something might explode or something. The light output was way brighter and whiter.

Can this circuit sustain a hour's worth of commute? Or will it be dangerous?

Best regards,

Edgar Jocson