Top 11 Best Battery Tender for Car Storage (TESTED $ TRUSTED) in 2021

I know you know the frustration of trying to wake a flat battery especially when you had grounded your car through winter or summer.

A jump starter might help you but the fact is that you might have to replace a dead battery.

Ensure that you never experience this again by getting one of the best battery chargers cum maintainers that will ensure that your battery is always ready when you are.

The best battery tender for car storage will enhance your auto battery’s performance and save you the cost of frequent battery replacement.

 
We took the time to test several battery tenders so that you don’t have to waste your time and bucks on helpless trial and error.

As compensation, we’ll earn a small commission when you click on the links here and better your life by purchasing one of these devices. This comes at absolutely no extra cost to you.

Reviews of the Best Battery Tender for Car

Editor's pick

Image
Name
Editor's Remark
Price
1. NOCO GENIUS5, 5-Amp Fully Automatic Smart Charger, 6V And 12V Battery Charger, Maintainer, and Battery Desulfator, best car battery maintainer
- It charges, maintains and desulfates the battery
2. Deltran Battery Tender 75 A Engine Start Battery Charger, Car Battery Jump Starter with integrated wireless connectivity, best battery tender for car storage
- Best for battery diagnostics
- It sends alerts to your mobile phone through Wi-Fi
3. STANLEY BC15BS Fully Automatic 15 A 12V Best Bench Battery Charger, Maintainer with 40A Engine Jump Starter, Patented Alternator Check, one of the best battery tender for car
- Best for jump starting small car

1. NOCO GENIUS5, 5-Amp Fully-Automatic Smart Charger, 6V and 12V Battery Charger/ Maintainer/ Desulfator

NOCO GENIUS5, 5-Amp Fully Automatic Smart Charger, 6V And 12V Battery Charger, Maintainer, and Battery Desulfator, best car battery maintainer

The Good

  • Compact and powerful design
  • All-in-one battery charger and maintainer
  • Suitable for all types of batteries
  • It repairs battery charging defects
Not so Good

  • The power cables need to be longer

Just like the battery tender enhances a car battery’s performance and prolongs its life, a rain guard or wind deflector preserves the upholstery by deflecting rain and other elements. Here is our review of the best rain guards for cars in 2021.

2. Deltran Battery Tender Plus 75 Amp Engine Start Battery Charger: 12V, 20 AMP Booster/ Car Battery Jump Starter/ Charger/ Maintainer with Integrated Wi-Fi

Deltran Battery Tender 75 A Engine Start Battery Charger, Car Battery Jump Starter with integrated wireless connectivity, best battery tender for car storage

The Good

  • You can monitor and control the charger from your smartphone
  • iOS and Android Apps
  • Jumpstarts a dead battery
  • Sends alerts to your mobile phone about your battery situation
Not so Good

  • Many users have trouble configuring the Wi-Fi network

3. STANLEY BC15BS Fully Automatic 15 Amp 12V Bench Battery Charger/Maintainer with 40A Engine Start, Alternator Check

STANLEY BC15BS Fully Automatic 15 A 12V Best Bench Battery Charger, Maintainer with 40A Engine Jump Starter, Patented Alternator Check, one of the best battery tender for car

The Good

  • Charges up to 40 percent faster than conventional chargers
  • Engine start function for small engine cars
  • Battery reconditioning and alternator check
  • Rugged design
Not so Good

  • Can only jump-start small cars and motorcycles

4. BLACK+DECKER BC2WBD Fully Automatic 2 Amp 12V Waterproof Battery Charger/Maintainer

BLACK+DECKER BC2WBD Automatic 2 Amp 12V Waterproof Battery Charger, Maintainer, best car battery tender

The Good

  • Can be used even in harsh weather elements
  • Optimizes battery life and performance
  • 1-year warranty
Not so Good

  • It’s not appropriate for freezing temperatures and temperatures above 40˚C

5. Deltran Battery Tender Plus Charger and Maintainer: 12V, 1.25 Amp Powersport Battery Charger and Maintainer

Deltran Battery Tender Plus Charger and Maintainer- 12V, 1.25 Amp, Best Battery Tender for Car, Motorcycles, ATVs, UTVs and more. Best battery tender for car in storage

The Good

  • Fast charging
  • Safety is guaranteed
  • Reversed polarity protection
  • Best battery tender for car in storage
Not so Good

  • Only maintains (doesn’t charge) large engine vehicle batteries eg tractors

6. Schumacher SP1297 12V Fully Automatic Battery Charger and 3A Maintainer

Schumacher SP1297 12V Fully Automatic Battery Charger and 3A Maintainer, best battery tender for car, best battery tender

The Good

  • Precision charging
  • Step-by-step charging instructions are provided
  • Safety and convenience
”Not

  • Cannot charge batteries for larger vehicles like RVs and trucks

7. Deltran Battery Tender 4-Bank: 12V, 1.25 Amp Battery Charger

Battery Tender 4-Bank- 12V, 1.25 Amp Battery Charger and Maintainer Bank with 4 Ports, best car battery maintainer, best multi-battery maintainer

The Good

  • Simultaneously charges up to four 6 or 12 Volt batteries
  • Safety and convenience
  • Versatile to fit a variety of automobile batteries
Not so Good

  • No quick-connect harnesses

8. Mroinge 12V 2A Lead Acid & Lithium(LiFePO4) Automatic Trickle Battery Charger Smart Battery Maintainer

Mroinge 12V 2A Lead Acid and Lithium -LiFePO4- Fully Automatic Trickle Battery Charger and Maintainer for Car, Motorcycle etc

The Good

  • Easy to use and monitor
  • 4 stage charging optimizes battery life and performance
  • Quick disconnect SAE plug
Not so Good

  • The power cables need to be longer
  • Not the best for low capacity (below 5Ah) batteries

9. Sailnovo Smart Charger 6/12V Fully Automatic Battery Charger, Battery Tender

Sailnovo Smart Charger 6V, 12V, Automatic Car Battery Charger, Maintainer, Best Battery Trickle Charger with Diagnostic Testing

The Good

  • Compact and powerful
  • Detects a defective battery before it starts charging it
  • Several safety features
Not so Good

  • We haven’t noticed one

10. Foval Automatic Trickle Battery Charger 12V 1000mA Smart Battery Charger- best trickle charger for the money

Foval Automatic Trickle Battery Charger 12V 1000 mA Smart Battery Charger, best trickle battery charger and maintainer

The Good

  • Connect it and forget it system
  • Several safety and ease-of-use features
  • Battery charge level indicator
Not so Good

  • Does not last as long as the Deltran battery tenders

11. MOTOPOWER MP00205A 12V 800mA Automatic Battery Charger, Maintainer, Trickle Charger, and Battery Desulfator

MOTOPOWER MP00205A 12V 800mA Best Battery Charger and Tender, Trickle Charger, and Desulfator with Timer Protection

The Good

  • Easy to operate
  • Energy- efficient
  • It cannot overcharge the battery
  • It desulfates the battery
Not so Good

  • Some users have found the user instructions hard to follow

A Buyer’s Guide for the Best Battery Tender for Car Storage

(i) Current Rating

The current rating of the battery tender you choose will determine how long it will take to charge your vehicle’s battery. Without accounting for losses, a 2 Amp charger will fill up a 10 AH battery in 5 hours while a 0.5 Amp charger will take 20 hours to fully power the same battery.

However, it’s important to note that you don’t want a charger whose current is too high for your battery. Charging a battery too quickly will overheat it and potentially shorten its life.

The ideal choice would be a battery tender with variable current.

(ii) Ampere-Hour Capacity

The charger’s AH rating should be higher than that of the battery if at all it is going to fully charge the battery. If your battery is 50 AH, then the tender or trickle charger should be at least 50 AH.

(iii) Safety

The best battery tender for car storage should be safe to use so that it doesn’t damage the battery. It should be able to guard against short-circuiting, reverse polarity connection, overcharging, overheating, sparks, water, oil, and other elements.

(iv) Multiple Functions

The more features your device has, the better because you’ll have one gadget doing the work of multiple gadgets. The best car battery tenders combine a battery charger, maintainer, trickle charger, and a battery regenerator. Battery maintainers that provide battery diagnostic information help prolong its life.

STANLEY BC15BS charger/maintainer can monitor the battery under load and it can also jump-start a small car or motorbike.

(v) Battery Type

Lead acid batteries can be charged by any type of charger but flooded, AGM, and gel cell batteries need a charger specifically designed for them.

FAQs: Best Battery Tender for Car

What is the Effect of Overcharging your Battery?

If you overcharge your car battery, it will eventually die. When a lead-acid battery is overcharged, the electrolyte heats up and the battery excessively generates both hydrogen and oxygen gases. In a vented battery, the cooking electrolyte will ruin the plates, damaging the battery.

In a sealed battery, the buildup of gases can burst the battery. The only way to avoid the risk of overcharging your vehicle’s battery is to buy a battery maintainer or tender that will automatically turn off once the battery is fully charged.

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