Can I overcharge the batteries on my Garmin Nuvi 200w GPS?

Can I overcharge the batteries on my Garmin Nuvi 200w GPS?I just got a GPS for my birthday and the charging slot matches the same slot of my cell phone. So my wall charger for my cell phone can fit into my GPS. Is this safe to do? Will it overcharge my GPS? The cell phone charger is the original packaged with a Motorola RAZR V3.

Golfer
They appear to be the same battery (1250 mah, 3.6 volts) which means you'll be ok using the Razr charger.

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