Compare Battery Deals

Meritline offers this Mini Battery Tester for $2.99 with free shipping. That's tied with our December mention and the lowest total price we could find for such a tester by $2. It tests AAA, AA, C, D, and other batteries.

Expect this item to take two to three weeks to arrive.

3Gorillas offers the Medis Fuel Cell PowerPak Xtreme Emergency Power Kit, model no. 990095A010, for $9.99 with free shipping. That's tied with our February mention and, outside of the price below, it's the lowest total price we could find by $7. This kit uses a fuel cell with 20 watt-hours of energy to provide light and charge cell phones during a power outage. It features a one fuel-cell device, 14-LED flashlight, connector tips for Nokia, mini USB, and micro USB devices, and more.

A close price: Today only, MidnightBox has it for $6.95 plus $3.99 for shipping.

Below, we've listed several battery pack deals. They're each among the lowest prices we've seen for high quantities of these batteries. Sales tax is added where applicable. The items, at Toys "R" Us unless otherwise noted:

• Toys "R" Us AA Ultra Alkaline Battery 40-Pack for $6.99 (order 2) + pickup
• Toys "R" Us AAA Ultra Alkaline Battery 40-Pack for $6.99 (order 2) + pickup
• Toys "R" Us C Ultra Alkaline Battery 12-Pack for $6.99 (order 2) + pickup
• Toys "R" Us D Ultra Alkaline Battery 12-Pack for $6.99 (order 2) + pickup
• Enercell AA Alkaline Battery 36-Pack for $9.99 + $7 s&h at RadioShack (ends 5/12)
• Enercell AAA Alkaline Battery 36-Pack for $9.99 + $7 s&h at RadioShack (ends 5/12)

Amazon offers its Prime members the Duracell Pre-Charged Rechargeable AA Batteries 4-Pack (pictured), model no. AA-RCHG-STAYx4, for $8.99. Clip the $1.50 off coupon on the product page to drop it to $7.49. With free shipping, that's $1.87 per battery and tied with a January mention as the lowest total price we could find, this time by $14. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.14.)

Also available is the Duracell Pre-Charged Rechargeable AAA Batteries 4-Pack, model no. AAA-RCHG-STAYx4, for $7.66 with free shipping via clippable coupon on the product page as well as Subscribe & Save. That's several cents under our February mention and the lowest total price we could find by $9. Be sure to cancel Subscribe & Save after your order ships, or you'll be charged for subsequent shipments.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months. (There is currently a waitlist for Amazon Mom.)