SmarToools RB20 AA 1.5V 2600mWh Rechargeable Battery ( 2 Pcs Set)

The smartoools rb20 is a set of two AA-size rechargeable batteries with a nominal voltage of 1.5V, which the listing describes as lithium-ion and charged by a Type-C USB cable. It is built for Bangladeshi households and small-device owners who want to stop buying disposable AA cells every time they run flat. This guide explains what the listing says, how to set the batteries up, and who should consider them.

• Overview of the smartoools rb20 AA batteries
• Key features
• Specifications
• How to use and set up the smartoools rb20
• Compatibility and what is in the box
• Who should buy it in Bangladesh
• Alternatives in our store
• Warranty and support
• Delivery, returns and ordering
• Frequently asked questions

Overview of the smartoools rb20 AA batteries

The smartoools rb20 is sold as a 2 Pcs Set of AA-size rechargeable batteries. The product listing gives the brand as SmarToools, the model number as RB20 and the nominal voltage as 1.5V, and it places the item in our Batteries & Chargers category. The listing’s specification block spells the brand as SMARTOOOLS, so you may see both spellings when you search for the smartoools rb20. The model number is RB20 in both places, so use that code when you compare listings.

For a Bangladeshi household, the appeal is simple. Many everyday devices still take AA cells, from wall clocks and TV remotes to torches kept near the door for load-shedding. Each time those cells run flat, someone has to make a trip to buy more. A rechargeable pair such as the smartoools rb20 moves that cycle to a USB-charged battery, so you recharge at the wall or from a power bank and keep the set ready for the next outage.

The listing describes the cells as lithium-ion with a Type-C USB charging method, a 5V charging voltage, a 2600mWh capacity and a typical 1733mAh rating. Those figures are useful when you compare the smartoools rb20 with other rechargeable options, because mWh and mAh are different units and the listing gives both. Read the specification table below before you decide, and check that your device takes a 1.5V AA cell.

It also helps to think about the smartoools rb20 as a replacement system rather than a single purchase. A rechargeable pair works best when it lives in one place, is charged on a regular schedule and is rotated into the devices that use the most power. Treated that way, the set can replace a steady stream of disposable cells in a home where small gadgets are used every day.

Key features

The features below come from the product listing and from general use guidance. Where the listing is silent, we say so.

USB Type-C charging at 5V

The smartoools rb20 is charged through a Type-C USB cable, and the listing gives the charging voltage as 5V. For Bangladeshi buyers this matters because a standard 5V USB source, such as a power bank or a wall adapter you already own, is the natural match. The listing does not name a specific adapter, so choose one rated for 5V and use a cable that fits the port on the cells. The listing gives a charging time of 2 hours (+-0.5), which is a useful planning figure when a power cut is announced.

Protection features as listed

The listing states that the smartoools rb20 has short-circuited, over-flowed, over-charged and over-discharged protection, and it marks each one as YES. Protection circuits are designed to reduce the risk from certain faults, but they do not replace careful handling. Do not short the terminals with metal objects, do not mix old and new cells in one device, and remove exhausted cells from equipment that will sit unused for a long time. The listing does not describe the protection in more detail, so treat the list as the maker’s claim. Keep the cells away from direct sun and hot window ledges.

LED charge indicators

According to the listing, the LED indicators blink while the cells are charging and stay on when they are fully charged. That gives you a simple visual check without a meter. In practice, leave the smartoools rb20 on charge until the light is steady, then unplug so the charger does not run longer than needed. If the light does not change, check the cable, the power source and the port before you assume a fault with the cells. Keep the charging setup in a ventilated spot, because humidity and heat in Dhaka homes can make a charging session feel warmer than expected.

Capacity and cell format

The listing gives a capacity of 2600mWh and a typical 1733mAh, with a nominal voltage of 1.5V and a lithium-ion material. Milliwatt-hours express energy, while milliamp-hours express charge at a given voltage, so the two figures are related but not the same measure. When you compare the smartoools rb20 with other rechargeable AA sets, look at both lines and check the rating on each pack. The listing does not give a cycle life, so ask us about long-term use before you buy if that matters to you.

Size and weight for tight compartments

The listing gives the diameter as minimum 13.7mm and maximum 14.5mm, the height as minimum 49.5mm and maximum 50.5mm, and the weight as 18.2 grams with a tolerance of plus or minus 0.5 grams. Those ranges matter because a cell outside the tolerance may not sit snugly in a holder. Measure the battery compartment of your device before you order, especially if you are replacing cells in a torch, a clock or a remote. Because the smartoools rb20 is a light cell, it suits remotes and small gadgets where weight matters. Do not force a cell into a compartment that feels too tight.

Charge time for power cuts

The listing gives a charging time of 2 hours (+-0.5) when the cells are charged through the Type-C USB cable at the listed 5V. That is short enough to charge the set during a normal evening of mains supply, and it leaves time to check the LED before you go to bed. Many homes already have a power bank for phones, and the same source may top up the smartoools rb20 in an emergency. The listing does not state that any particular power bank is approved, so check the output rating before you rely on one.

Specifications

These are listed specifications from the product listing.

How to use and set up the smartoools rb20

Start by checking the device. Confirm that it takes a 1.5V AA cell and that the battery compartment has room for the listed diameter and height. Some devices with an internal charge circuit or a lithium-only setting may behave differently, so read the device manual before you insert any rechargeable cells. If the manual says alkaline cells only, keep the smartoools rb20 for devices that accept rechargeable batteries.

Next, charge the set. Connect the Type-C USB cable to the cells and to a 5V USB source, such as a power bank or a wall adapter you already own. The listing gives a charging time of 2 hours, plus or minus half an hour. Watch the LED indicator: it blinks while charging and stays on when full. Unplug once the light is steady, and note the time so you know when the set was last topped up.

Insert the cells with the polarity marks matching the device. Keep the pair together as a set, and do not mix them with cells of a different chemistry or age, because uneven cells can give uneven performance in the same device. When one cell of the smartoools rb20 pair starts to weaken, replace both cells together so the set stays matched.

For storage, keep charged cells in a cool, dry place away from metal objects such as coins, keys and paper clips. In Bangladesh’s humid months, store them in a sealed box with a dry pouch or in a room that does not get very hot. If you will leave the smartoools rb20 unused for a long period, recharge partly used cells before storing them, as a general habit with lithium-ion products.

For load-shedding, charge the set during mains supply and keep it in a known place. Because the listing gives a 2-hour charge time, you can top up before an outage without waiting for the grid. Keep a torch or device with fresh cells nearby as well, so the set is not the only source of power in the house. Writing the last charge date on a label on the box helps the whole family know the state of the set.

A simple weekly routine helps. Charge the smartoools rb20 on the same day each week, check the LED, and move the pair into the devices that use the most power, such as a torch or a wireless mouse, so the set is used rather than forgotten in a drawer.

When the set is spent, do not put lithium-ion cells in household waste bins. Take them to a collection point that accepts batteries. Keep depleted cells apart from new ones, so you can track when the smartoools rb20 set needs replacing. For background on how these devices work, see the battery charger explainer on Wikipedia.

Compatibility and what is in the box

The listing describes the smartoools rb20 as a 1.5V AA lithium-ion rechargeable battery with a Type-C USB charging method. It does not list a set of compatible devices, so the listing alone cannot confirm a match for a particular torch, remote, clock or toy. Confirm your model before you order, and check the device manual for a 1.5V AA rating.

In the box: the product is sold as a 2 Pcs Set according to the title, which is the number of cells the listing describes. The listing does not describe the contents beyond the set size. Whether a Type-C cable, a storage case or an instruction leaflet is included is a question for our team before you order, and the listing itself does not answer it.

Size matters here. The SmarToools RB20 AAA model is a different size with its own listing, so do not put AAA cells in an AA compartment or the reverse. Check the size label on the pack before you buy, and compare the two listings side by side if you are unsure which format your device needs.

Charging accessories: the listing does not mention a separate charging cradle. The Type-C method means you can charge the smartoools rb20 directly from a USB source, which keeps your kit simple. If you prefer a dedicated charger that handles several cells at once, the Liitokala charger in the alternatives section below is a four-slot option.

Power sources also differ. A Type-C USB source rated at 5V is the match the listing describes. A higher-voltage adapter that is not designed for 5V output is not a sensible choice for these cells, so use the source you already trust for phones and check its output label first.

Who should buy it in Bangladesh

Households facing load-shedding are the clearest fit. A pair of rechargeable AA cells for a torch or a radio means you can top up in the evening and keep the set ready for the next outage. The listed charge time of about 2 hours makes that routine easy to plan around a normal mains schedule, and the LED makes it simple for anyone in the house to check.

Dhaka commuters with small gadgets may also find the smartoools rb20 useful. If a wireless keyboard, a mouse or a small handheld device accepts AA cells, a rechargeable pair cuts the need for last-minute purchases on the way home. Check the device first, because the listing does not confirm compatibility with any specific product.

Families who use remote controls, wall clocks and children’s toys can benefit from a set they keep charged in one place. Label the set, keep it with the chargers you own, and recharge it on a fixed day each week, so nobody runs out during a film or at prayer time.

Small shops and offices with wall clocks, counters or sensors can also use the smartoools rb20 for low-power devices. The listing gives no drain rating, so ask before using the cells in equipment that demands high current, such as motor-driven toys or larger electronic gear.

People who already own a 5V USB charger and want to avoid another mains-only device may also find the smartoools rb20 a neat fit. The Type-C method means the same source that charges a phone can charge the set, which suits a flat where space is limited.

Who should look elsewhere: if you need a phone battery, a lithium-polymer cell for a specific handset or a larger format, the smartoools rb20 is not the right product. The alternatives section below lists related items in our store, and each listing explains its own size and format.

Alternatives in our store

If the smartoools rb20 is not the right fit, these related products may help. The Hoco J112 iPx Smart Li-Polymer 2716mAh iPhone X Battery is a phone battery rather than an AA cell, so it suits a different repair need. The Liitokala Lii M4S 4-Slot Multifunctional Battery Charger is useful if you run several rechargeable cells at once. The SmarToools RB20 AAA 1.5V 750 mWh Rechargeable Battery (2 Pcs Set) is a smaller AAA format, so compare its listing with the smartoools rb20 AA set before choosing. The 21700A Lithium-Ion Rechargeable Battery – 4.2V 5000mAh High Capacity (Made in Japan) is a lithium-ion cell for a different format. For the full range, browse the Batteries & Chargers category.

Warranty and support

Warranty: 6 Months seller warranty.

Delivery, returns and ordering

We deliver all over Bangladesh and you pay cash on delivery. Delivery usually takes 1–3 days inside Dhaka city and 2–5 days outside Dhaka, so you can plan the smartoools rb20 around your outage or household schedule.

You can return it within 7 days of delivery (see our Delivery & Returns policy). Questions before ordering: call 09638054751, message us on Facebook Messenger or email care@gadgetsuperb.com. The full terms are on our Delivery & Returns policy page.

When you ask about the smartoools rb20, give us the product name and the pack size, so we can answer from the right listing. Keep your order details to hand when you call, and check the policy page for the steps that apply to your return.

Frequently asked questions

Is the smartoools rb20 a 1.5V AA battery?

Yes. The listing gives the nominal voltage as 1.5V and describes the product as an AA-size rechargeable battery set.

How is the smartoools rb20 charged?

According to the listing, it is charged with a Type-C USB cable at a 5V charging voltage. The listed charging time is 2 hours (+-0.5).

What do the LED lights on the smartoools rb20 mean?

The listing says the light blinks while the cells are charging and stays on when they are fully charged.

What capacity does the smartoools rb20 have?

The listing gives a capacity of 2600mWh and a typical rating of 1733mAh. The two units measure different things, so compare like with like.

Does the smartoools rb20 have protection circuits?

The listing states short-circuited, over-flowed, over-charged and over-discharged protection, each marked YES. Treat this as the maker’s listed claim.

What are the size and weight of the smartoools rb20?

The listing gives a diameter of 13.7mm to 14.5mm, a height of 49.5mm to 50.5mm, and a weight of 18.2 grams with a tolerance of plus or minus 0.5 grams.

Will the smartoools rb20 fit my device?

Check the device manual for a 1.5V AA rating and measure the battery compartment against the listed size. The listing does not give a list of compatible devices, so confirm your model before you order.

How long is the warranty on the smartoools rb20?

Warranty: 6 Months seller warranty. Contact us by phone, Messenger or email if you have questions before you order.

How long does delivery of the smartoools rb20 take?

Delivery usually takes 1–3 days inside Dhaka city and 2–5 days outside Dhaka. We deliver all over Bangladesh and you pay cash on delivery.

Can I return the smartoools rb20 if it does not suit me?

Yes, you can return it within 7 days of delivery. See the Delivery and Returns policy page for the steps.