Review title is Oral-B (4000) rechargeable electric toothbrush [SEP] I noticed that the battery in the Oral-B rechargeable toothbrush I've had for two years seems to be wearing down as it will start laboring even before the battery icon starts to blink, indicating it needs to be charged.  So, I decided to order a new one before my old one dies completely.  This is a little different as a red light blinks when you turn it on/off if the battery needs to be recharged.  However, it surprised me because when the  red light started blinking, the brushing was as vigorous as when I had just charged it.  My purchase also qualified for a rebate so am very pleased.<br /><br />JUST TO ALERT PEOPLE WHO SEND FOR THE REBATE - My order came in a brown cardboard box with a large adhesive label with the UPC code - I cut that off (in the bottom left-hand corner of the rebate form, it does say to do that) and sent it in with the rebate form and my invoice - all of that was returned to me with a form letter that stated that the UPC I submitted was "not valid" for the rebate offer!  I e-mailed Amazon and they were very nice and credited my card with the $20.  I don't understand what is wrong with the Oral-B people that they are saying I submitted an invalid UPC since that was the only thing on the box!!