Walmart offers the Everstart Multi-Function Jump Starter and Battery Charger, model no. TL9608, for $29. Choose in-store pickup to dodge the $4.97 shipping fee. That's $6 under our February mention, the best deal now by $6, and the lowest price we've seen. This 12,000mAh lithium battery functions as a jump starter, flashlight, or emergency cellphone charger.