iTEKIRO 1100mAh Replacement Battery for Vivitar DVR-840XHD DVR-565HD DVR-390H DVR-530 DVR-545 DVR-550 DVR-550G DVR-688 DVR-710 DVR-7300X Vivicam 3930 4000 Digital Cameras Camcorders 1100mAh higher capacity compared with original 1050mAh Made with high quality cells for the best performance The battery's integrated microchip prevents overcharging & lengthens battery life Lithium Ion chemistry type has no "memory effect" Backed by 30 days money back guarantee and 1 year replacement warranty